Science

Hi
There are two routes to do that.
1. Appear for CDS to join army as an officer.
2. Go for JCO (Junior commissioned officer) catering science recruitment.
You will get all the required info here.
http://joinindianarmy.nic.in/jco-or-enrollment.htm

Hi
Yes, you can do bsc + msc and then mtech for physics related field. If you are keen to become an astrophysicist, check BS + MS courses at IISER or IISC. All the best

Ofcourse, goes without saying. Every country has their own education system, recognized by other countries. However yes the degree granting institution must be accredited by the respective accreditation boards.

Hi Dear,
RKDF College of Pharmacy, Bhopal is approved by Pharmacy Council of India.
Check it here.
www.pci.nic.in/collegescourses/approveddegreeinstitutionsus12-5.aspx

You cannot possibly pursue an UG degree after you complete your masters. Also you must complete your bachelor before you could apply for masters. These are standard norms followed universally.

Syllabus and weightage of chapter of AIPMT and NEET will be same. The difficulty level will also be same.

It totally depends upon your interest. If you are interested into the subject you must go for it. It's always better to do what you want to do than what others want you to do. Go through the subject topics and also know about other streams also go through its topics, BT has wide scope into science researches, so if you feel pull towards it, go ahead.
All the best! :)

You need to do masters and then Doctor of Philosophy. You need to have good acedemics from good colleges.
All the best