M.Sc

You can do M.Sc in maths but if should be done in accordance with your Bachelor's degree.

Hi,
M.Sc IT/CS is a general course. It does not give you any placement opportunity but B.Tech and MCA are professional course. B.Tech IT/CSE and MCA both are similar but B.Tech IT/CSES is more preferable and valuable course. B.Tech IT/CSE has more recruitments than MCA. If you choose B.Tech then you would be able to choose your valuable 2 years. Within these 2 years you can pursue further courses like M.Tech / MS/ MBA (for management experience).
I hope you understand my point.

Hi,
Following are the top colleges for the same:
St Stephen's College, New Delhi
St. Xavier's College, Mumbai, Maharashtra
Madras Christian College [MCC], Chennai
Loyola College, Chennai
Christ University, Bangalore
Presidency College, Chennai.

MBA and M.Sc. both are good courses and both have good scopes also. As you have done B.Sc. in nursing then I think you should do M.Sc. as it has more scope than MBA. After M.Sc. in nursing you can get a good job in hospitals, clinics and labs with a good salary.

Hi,
Below is the list of universities from where you can pursue M.Sc in physics and chemistry:
1. Maharishi Markandeshwar University
2. Maharshi Dayanand University
3. Guru Jambheshwar University of Science and Technology (GJUST)
4. Chaudhary Devi Lal University
5. Kurukshetra University

You have to prepare a research proposal and apply with IELTS marks, then you can get admission. Alternatively, you can do 1 year research degree like M.Res or M.Phil, then you can pursue Ph.D.

It has bright future in South India, so you should search for the university in South India.