Science

First of all the depends on your inclination of your hobby. since you have done 12th with science ,then you have a wide options of career to explore for you can do b.b.a(bachelor of business administration) or B.A(bachelor of arts) and you can also prepare for U.P.S.C. so there are number of options but the questions depends upon you. choose that career in which you have inclination best of luck

Dear these two are different stream, to go anyone stream one have to decide at the level of tenth I.e. either he want to take commerce or science. Both are not a professional course but almost equal job opportunity.For higher studies and research these two are best.

If you have aptitude, go for entrance test of PUSA. if not PUSA then also you must choose a university or institute of repute if you are seriously looking for career in hotel management.

You can go for amity Noida for BCA plus MCA. You can also go for IP university if you appeared for entrance exam

Being good or bad in Maths doesn't matter in engineering provided you have right aptitude towards problem solving be it is maths or any other subject. Rest depends on your score which branch you will get. But go with your passion.

if you interested in psychology then you can chose Ba (Honours) psychology programme and join Sam Higginbotom Institute Of Agriculture Technology and Sciences, SHIATS, allahabad, Uttar Pradesh and prepare for TISS to more study and jobs opportunities

Actually, it is difficult but I think you should check in Indira Gandhi National Open University.