Science

If you want to do M.Sc. From government college then IIT JAM Entrance exam is for you. By this exam you can get admission in Reputed colleges like IIT's and NIT's, from where you can do M.Sc. These Central Government colleges are best for this course in my point of view.

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If you have knowledge of programming then you can get easily job in any MNC. There is demand of master of maths with knowledge of computers. Scientist : If you qualify GATE you can enter DRDO as scientist. Risk analyst: If you have done statistics then in Insurance companies will recruit you as risk analyst.

Yes, you can definitely pursue your BBA. But be careful while choosing your college or university as it will also impact a lot in your future.

I think for Engineering and most of the courses you should have at least a minimum of 60%aggregate in PCM to be eligible for admission. But particularly, I will suggest you to contact the admission department of the college you are interested to take admission.

AIIMS only provide M. Biotech in the stream of biotechnology which is a master's degree. The college which provides B.Tech Biotech like IITs, NITs, CFTIs and GFTIs etc. You have to gone through JEE-Mains then JEE Advanced. The 12th subjects combination for JEE Main for Biotechnology is given below. Subjects: Candidates must have to take minimum 5 subjects in 12th/equivalent examination. Candidates appearing for JEE Main must have passed class 12th with Physics & Mathematics as compulsory subjects along with anyone from the Chemistry/Biotechnology/Biology/ Technical Vocational subject.