Science

From your msc 2nd year you can compete UGC-NET exam and after msc you will be able to pursue phd if you clear net exam and you will get a good stipend for pursuing phd. Parallely you will become junior research fellow. After phd, you can easily compete college service exam of different states and get professorship. All the best.

Dear Steffi, if you check the websites of each of the universities carefully you will know that GRE is not mandatory for students having a prior degree in mathematics. Having said that since requirements and selectivity depends on a particular university alone I will strongly advise you to communicate with the universities directly.
Best Wishes

If you compare BDS and BVSC than BDS has a better future both in India and Abroad. More openings and better career prospects.
All the best.
Feel free to revert.

Dear vidit
I wouldn't recommend you for Ignou specially in science field. You should go for regular school through that you will get the right tools, knowledge and practical approach for physics,biology and chemistry subjects.
All the best

It is a good suggestion. You are also advised to obtain Flying licence to fulfill your dream. By the way in India , first two astronauts came from Indian Air Force fighter flying branch.

if you interested in psychology then you can chose Ba (Honours) psychology programme at TISS or Sam Higginbotom Institute Of Agriculture Technology and Sciences, SHIATS, allahabad, Uttar Pradesh psychology helps u in ur mains exam

MSc CS is a good option for starting a career in IT industry. It is equated equal to BTech IT and MCA. It is suggested that if you are planning to do BSc CS then plan your education minimum upto MSc CS for a good career from a reputed university.

if you interested in psychology then you can chose Ba (Honours)psychology at Sam Higginbotom Institute Of Agriculture Technology and Sciences, SHIATS, allahabad, Uttar Pradesh and prepare for TISS because here u can get more opportunities