I have not too much idea about Anna University courses. But I can guide you for selection.
Above all courses are good. Course selection depends on your choice, in which field you are good so that you can grow more and you can study with 100%.
Never copy others, never select course by just prediction only.
If you like Mechanical or Electrical Engineering, and if you are able to get admission with your this percentage then select first Mechanical then Electrical engineering. Mechanical is evergreen field. Also you will get good job opportunity as a fresher and after experienced with good salary. There are lots of companies in India which require mechanical engineers.
Next If you like to make career in IT software field, then select Computer Engineering. Computer field is also good.
As per me, Chemical Engineering, printing technology, production engineering and Geo-informatics have less seats and also have good opportunities after study.
Aeronautical Engineering is also one good growing field. There are good opportunity in this. It is related to Mechanical Engineering.
Electronics and communication engineering, Electrical and electronics engineering, Electronics and instrumentation engineering are almost same except some subjects. Electronics is common for all these. Communication have some telecom related subjects. Electrical has some electrical related subjects. Instrumentation deals with all kind of instruments which uses electronic principle to run.
For your Information: Electronics and Electrical both are totally different. Electronics came from Electrical. In a layman language Electronics deal with law voltage designed things such as PCBs and digital things. Electrical deal with high voltage designed things.
Even in this time, if you select B.Sc, then it will also be good. All are going for only engineering. No one prefer to go for B.Sc. There will be demand after few years for B.Sc.
Whatever you select, work hard and you will get success. Knowledge is the power. Try to understand things from basics, which will help you to grow more.
Best of luck for your career.
Thanks & Regards,