Dear Shruti,
Following are eligibility criteria for BHU 2020 for bcom hons

1. Candidate should have passed 10+2 or equivalent exam from the recognized board.
2. Applying candidate must have done 12th level with the subjects of Economics/Commerce/ Computer Science/ Maths/ Finance/ Financial Markets Management.
3. He/she must have secured minimum of 50% aggregate marks in the qualifying exam.
4. Candidate should not be more than 22 years, as on 1st July 2020.

As you have you have done economics it shouldn't be any problem to get an admission in BHU 2020 but I will request you to check other eligibility criteria as well whether you can fulfill those criteria or not.

I hope this information helps you

All the best