Hello Aspirant!
As earlier it was not accepted by the universities but in recent years many universities have taken this initiative to allow a science student to do BCom. Colleges are open-minded about admitting students from the science background. So, you can do B. Com. The Eligibility criteria are:-
A.Candidates from Commerce Stream- Minimum 60% aggregate AND 55% in Accountancy
B. Candidates from Science Stream-Minimum 60% aggregate AND 60% in Mathematics
C.Candidates with Eco, Stats, Maths in Class XII- Minimum 60% in aggregate AND 60% in Mathematics

Colleges that can be considered are: Hans Raj College, New Delhi, Madras Christian College, LovelyProfessional University, Hindu College, New Delhi, Christ University, Bangalore, St. Josephs College of Commerce, Bangalore, Shri Ram College of Commerce, Loyola College, Chennai, Narsee Monjee College of Commerce and Economics, Mumbai, St. Xaviers College, Mumbai, K. J. Somaiya College of Arts and Commerce, R.A. Podar College of Commerce & Economics.

i guess no....yr its vry dfrrt frm sce