Science

Science is a vast stream. Main divisions in Science are Physics, Chemistry, and Biology. In these 3 there are still a number of subdivisions. Till 12th you will primarily study at least 2 of these divisions. After 12th based on your field of interest, you can choose your stream for graduation. If you want to have more exposure towards Science than look for National Talent search exam, National Science Olympiad, International Earth Science Olympiad, Kishore Vaigyanik Protsahan Yojana (KVPY). These exams will help you to get a good knowledge in the field of Science and help you in future as well.

If I suggest, you have to go in engineering especially in computer science because in the coming era, there Is a large scope for computer engineers.

No, it is not compulsory that everyone will be just placed. After completing BSc in agriculture, you will have to be good in skills and your aggregate should be the best for getting placed.

Wherever you want to study whether in India or abroad, you have to give exams like CAT or GATE or you can opt for any other exams through their only you will get the scholarship to go for higher studies.

I don't know for which college you are asking about but I am sure that most of the best colleges will not allow you to sit in the college for 46% in the Science stream.

This is a Shiksha link where you will get different reviews:
https://www.shiksha.com/university/deen-dayal-upadhyaya-gorakhpur-university-22540/reviews

Hi friend,
Yes, you can do M.Sc after completing B.com. But i can say that this option is not good for you. Because most of the science stream students do for M.Sc., so you can do for the LLB, M.Com and M.A after completing B.Com. M.Com is the the best option after completing B.Com. In M.Com, good job opportunities are there. You also have a good further scope about your future.
ALL THE BEST TO YOUR FUTURE.