Best Question-Answer websites in India

There are many sites in internet which are dedicated to or have a section on questions and answers. Many of these sites were earlier paying to its members who were giving quality answers. Some sites simply gave points to them so that they became honoured expert members. Slowly the scenario changed as a large number of people voluntarily started to answer the questions without any remuneration. One such site which has come up very successfully in the internet is Quora. There are many members who are regularly answering questions in that site.
Apart from that other popular and leading sites are Answers, Stack Overflow, Yahoo Answers, Hacker News, Ask Opinion, Answerbag, Stackoverflow, Indiastudychannel, Fluther, Linkedin, Ask, Wikihow, Super User etc.
There are some bloggers who link these sites to their blogs in one way and another and generate some traffic and are able to monetise it though it is an indirect way of monetising the traffic to one's blog.

My experience is that Quora is comparatively the best site for question -answer in general.
Even our own ISC is having a very useful question-answer section "Ask Experts".

However in most Q_A sites, the answer inputs are coming from general people as well as experts on the related field. One question itself will have many answers and it may be difficult for the reader to ascertain which is the most authentic answer. In most such sites either there is no moderation and editing or the moderation and editing is also done by general people.
However if the search is for a common matter one can find which is the suitable satisfying answer for his doubt or search and what remedies his issue.

By and large most such sites are helpful, If one is in need of very authentic and special expert answer, then it is better to refer to some specialist expert sources additionally and confirm.

Quora is one of the important sites where we can find many people answering the questions asked by various members. We will find a variety of answers on this site. I will be also answering some questions on this site. But there is no money involved in this. I know they were giving some points.
Ask Experts on ISC is another site where you can find questions and answers. Here you will get points and CC also. The extent depends on the answer you give. But the points and money involved are not very high. You may get Rs1/- also for some answers based on the quality of the answer.
To be frank enough with you, the earnings on any of these sites are not in proportion to the time you spend. It is more an experience and knowledge gaining more than earnings.
Some other sites that are worth mentioning are Yahoo Answers, Hacker News, Answerbag and Wikihow.

Though there are different platforms where the readers post queries to resolve their doubts to get the right solutions such as Indiastudychannel. Yahoo.LinkedIn.Quora etc but of all these sites Quora seems ti be best since you are getting multiple solutions for the doubts you have raised. You need to pick up the best answer which might be applicable in your case. Sometimes. you might be stuck up due to the different opinions of the answer providers and in that situation. you could examine identical answers suiting the best in your case. By going through their responses, you would be able solve your issue for which no solution was forthcoming from your end.
Even you may try to resolve your issues from Indiastudychannel where the members of this site would be pleased to provide you right answer matching your needs.

I researched your question regarding the question-answers sites and it was very interesting. While doing this workout, I learned a lot about various question-answers sites and their niches. I understood one thing we can't predict any website to be the best. Because some of the popular websites like Yahoo answers, Google answers, Wiki answers, Linkedin answers, etc., were shut down. I give answers to your questions one by one below.

(a) What are the best and most popular Question-Answer sites?

The following are the top question-answers sites available worldwide and also, accessible in India. These sites listed are accepting questions and answers on all topics and all of these sites are running live as of the date of writing this answer. Almost all countries are allowed to contribute on these sites:

1. IndiaStudyChannel (www.indiastudychannel.com)
2. Ask Meta Filter (ask.metafilter.com)
3. Blurtit (www.blurtit.com)
4. Reddit (www.reddit.com)
5. The Straight Dope (www.straightdope.com)
6. Answers (www.answers.com)
7. Askfree (askfree.co)
8. Quora (www.quora.com)

(b) Is it financially beneficial to write answers on these Question-Answer sites?

On some question-answer sites like IndiaStudyChannel, you can earn some handsome money for your contributions. Some sites do not pay for questions or answers. But, you can wisely use these websites for promoting your blog posts or website content by not spamming their sites.

By doing this, you create a quality backlink to your site and increase your website's PageRank. Also, visitors directly visit your answer post and chances are there for your website link to be visited legally.

If you're on the lookout for best question and answer sites, here's your list:

Reddit: Reddit hosts a plethora of communities (subreddits) covering virtually every topic imaginable. Whether you're interested in science, technology, history, or hobbies like photography or cooking, you'll find a subreddit dedicated to it. Engaging in discussions, asking questions, and sharing knowledge are all integral parts of the Reddit experience.

Stack Exchange: Stack Exchange is a network of Q&A websites covering a wide range of topics, including programming, mathematics, science, and more. Sites like Stack Overflow, Super User, and Ask Ubuntu provide platforms for asking specific questions and receiving expert answers from the community.

Answerclub: Answerclub is an online portal dedicated to providing answers to a diverse array of questions. It serves as a platform where users can seek expert guidance, engage in discussions, and share knowledge across various topics. With its emphasis on quality answers and vibrant community interactions, Answerclub is a valuable resource for knowledge seekers.

Yahoo Answers: Despite its decline in popularity over the years, Yahoo Answers still remains a platform where users can ask questions on virtually any topic and receive answers from the community. While the quality of responses may vary, it can still be a useful resource for gathering information and insights.

QuizzClub: QuizzClub offers a unique twist on knowledge acquisition by presenting quizzes and trivia across different categories. While primarily focused on testing your knowledge through quizzes, QuizzClub also provides explanations and interesting facts related to the questions, making it a fun and interactive way to learn new information.

Each of these platforms offers its own unique features and community dynamics, so exploring them can be a great way to enhance your knowledge and engage with like-minded individuals.