You can consider below given eligibility criteria for B.Com (H) in BHU -

MINIMUM ELIGIBILITY REQUIREMENTS: Passed 10+2 or equivalent Examination with Commerce/ Economics/ Maths/ Computer Sc./Finance/Financial Markets Management as one of the subjects securing a minimum of 50% marks in the aggregate and must have passed in the concerned subject.

For more information, you can go through below link -

http://www.bhu.ac.in/course/ug.php

Good Luck!!!!