Interrogative adjectives: What, which and whose are used for asking questions. When we use the above words before a noun to ask questions, they are called interrogative adjectives.
For Example: At what time does the train leave? Whose brother are you? Which singer do you like the best?
Please note: We use the interrogative adjective 'which' when there is a choice to make.
What hobbies do you pursue?
Which city is the biggest one in India?
Whose book is lying on the table?