CBSE 12th

For opening a medical shop I believe you mean a chemist/druggist store. So for that, you need a license issued by the regional authority on basis of your academic requirements qualifications that may be D.Pharm too. So, yes.

Yup, sure you need to score well in your +2 examinations.
For general candidates:
1. 75% overall.
OR
2. Be in the top 20 percentile of your respective boards
For reserved candidates:
1. 65% overall that's it.
Hope this helps.
All the best!

Yes why not, you are advised to appear NCHMCT JEE entrance exam for getting admission in top central and state govt. IHMs.
You can visit www.nchmct.nic.in for more information!
Good luck!

By working hard and getting your all queries solved by that time only and surely by doing good in practicals exams.
Hope this helps!
All the very best!

For engineering Physics, Chemistry and Maths are required in 10,10+2. So, it will be difficult to get into engineering. You can look for other Bachelors courses related to Computers.

Both Automobile and Textile Engineering are well developed and matured Industries in India. But Automobile and it's ancillary industries are slowly becoming outsourcing hub for MNCs in India. Therefore, Automobile engineering grads have more opportunities in comparison to Textile Engineering grads. My recommendations for your brother in Automobile Engineering.