Science

You have to opt between Botany and Zoology, or both, depending on the University to which you belong. The selection of a subject is mainly on individual consideration. Then only, you perform better in Research and Publications. Then, you have to study with a sense of responsibility.

Both are the same.

You have B.Tech IT and BSc IT in IT sector, other than that we have Diploma courses. You can choose as per your convenience.

You need to atleast have good technical degree like B.tech and then Following by MBA for managerial skills and business acumen. XIME Bangalore is best mba coll for entrepreneurs.

Gov jobs are only advised after graduation and have very low pay. So join pvt companies after joining course like Engineering in Civil, Electronic, Telecom, Automobile, IT, Computer Science.
you can also go after BCA and BSc IT.

Only only & only practice can help u a lot.
More & more problems will help in clear the concept & application of formulas.
You should focus on boosting your speed, revise end result, key points of some chapter.

BPT is a good option if you are people's person, have empathy and willingness to serve people. A good physiotherapist in a private hospital earns upto 2k per sitting.
With B Sc, you may go for M.Sc and then in research or education.