Career

M.Sc and Ph.D or M.Phil in any of the three subjects. The research career in the teaching field at a college or university. There is a severe shortage of talent in the pure science field. If you genuinely have research talent, go for it.
All the best.

Well, it depends upon your interest. Either you can opt M.Com or MBA in Finance. All depends upon you.

You have to find your admit card on google or suggested official website by T-2 examination by board. So, you can get easily on their official website.

Hello Shubham,
Yes, you can do BCA via distance. Here, you can check in the link for complete details:
https://www.shiksha.com/it-software/colleges/distance-correspondence-bca-colleges-india

You can go for BBA, B.Com (H), BCA and LLB. You can also go in the media field and pursue BJMC.
If you find interest in hotel management, you can also pursue that. You have a pretty good score in class 12th. So,you can also do Bachelor in a subject you like. If you want to go in teaching line, you can do B.El.Ed. It all depends on your interest.

There are many options. According to me, go for NUS, Singapore.

Agricultural engineering has a very good scope because India in an agricultural based country. You can get jobs in government companies. Salary is also good.
Good luck.