CBSE 12th

There is a link below that will redirect you to a page where you can find out the expected cut off for the colleges that you might get into with JEE score:
https://shiksha.com/b-tech/resources/jee-mains-college-predictor

Dear,
Yes, you are eligible with this percentage but you need score extremely well in CAT. Your score must be above 90%ile to get a call for GD and interview and you should work on your communication skills, GD round, market knowledge and expertise.
All the best.

After 12th, register for CLAT online.
Prepare for exam and it conducts in the month of May every year.
However, CLAT is very tough so you need to take coaching.

Hi Arun,
Gaps are not preferred by Australian Universities. However, these are case specific and if you have a good profile with work experience, you may have a chance. But always keep back up options and check other countries too. Take your IELTS. Decide what to study, check the admission requirements on university websites and email them before applying.

You should take Diploma only when you are totally sure which field u want to pursue in future but it seems like you are confused about PCM and PCB, please let me know your 10 scores. At last, it depends on your interest.

Physiotherapy, pharmacy, prosthetics, lab technology, nursing, biotechnology, biochemistry, etc.

Ethical hacking is basically about learning how to find security vulnerabilities in IT systems. If you want to learn cyber security you can enroll for any of the training programs by http://pune.cssrl.in The training is possible in regular classroom or in online mode. The career options in the field of cyber security are growing a lot these days.
https://www.youtube.com/attribution_link?a=Jkge3N1QJIlaGamq&u=/watch?v=odgZddgDfOs&feature=em-share_video_user

Hi Joel,
Yes, you can however an Economics, Statistics and Mathematics combination is more apt if your final goals is to become an economist.