B.Sc

12th is compulsary for B.Sc. Hope you know that.
Check this link and see prospectus. The application process started in May:
http://reg1.stellamariscollege.org/OnlineApp_Home.aspx

Hi Nitish,
Here is the link for cracking the UPCATET exam. It can help you get admission to B.Sc. colleges in India.
https://www.shiksha.com/science/exams/upcatet/question-
papers
All the best.

M.Sc. in Astrophysics will be better option to pursue. As you have already done Physics, so you will be eligible for it. Diploma will not be much helpful. Regular B.Sc. will have more benefits.

Hello Rani,
The fee for B.Sc. in cardiology laboratory technique in Jamia Hamdard University is approximately 1 lac per year.

Hi Shreya,
A similar answer is available on he link below. However, you may find that the question might not be an exact match but still would advise you to refer to the second answer. As it seems more relevant to your question for not appearing in JET.
https://ask.shiksha.com/i-am-from-patna-can-i-

Hi,
Being a bio student, you can go for medical field or else you can do plain B.Sc. in the subject you like, which usually does not require any exam. And after that, you can apply in any colleges. Hope this might help you.
Wish you all the best.

Hello Sir,
That fully depends on your work experience background. If you have a great work experience, it will come in handy to get a new job in the field of management.
I wish you all the very best.