BHU B.Sc. Biology will provide you combination of 3 core subjects at the time of counseling which you have to choose according to your priorities. There would be 17 combinations of subjects with Preference Honours.

One should have to give priorities according to their interests. If you have alloted BZC (Botany, Zoology and Chemistry with Botany Honours),you would have to study these subjects upto 2nd year of course and Botany only in final year of course

The following  answers your question , so there are approximately 400 seats