Science

Your graduation will be valid but central governments jobs are almost difficult for u. Normally age limit is 25 to 27( if u r not from any reserved category) years for these jobs.
Now second option may be ur home state .if local government have raised the age limit then you can apply. So kindly confirm the age limit criteria of your state or any other state. especially of state PSC(Some state PSC have 35 years as maximum limit).

Agar 10+2 me aapka math hai tabhi aap Bsc IT kar sakte ho otherwise you can go for BCA. IT field me arts valo ko enter krne ka BCA ek rasta hai. Uske baad aap MCA kijiyega.

Hi
Both hv their own benefit and it depends on how u wish to contribute to the ever-evolving science. Engineering teaches you the technical know-how and best approaches to innovate.
Following the pure sciences route you will contribute to the particular subject in research.

Dear Lakshmi,
Applicants must normally hold a four years bachelor degree with high academic standing. You must visit university websites for individual admission requirements. Application process is online. University of Prince Edward Island is quite popular for this field.
Best wishes

yes you can go

MBA IT ,petroleum, logistics, operations are suitable
mba general management is also fine with mba in hr mba in marketing
MBA is finance is least suitable

Calculus is a conceptual framework which provides systematic techniques for solving problems. These problems are appropriately applicable to analytic geometry and algebra.
Precalculus gives you the background for the mathematical concepts, problems, issues and techniques that appear in calculus, including trigonometry, functions, complex numbers, vectors, matrices, and others.
In india, Some part of precalculus starts in grade 7 onwards. Calculus is mostly covered in grade 11 and 12.
Hope it helps.

After pursuing BTech Biotech you can go ahead for MTech program as it is required to get core industry job and will also help you in getting into R&D.