Dear Deepanshu, CBSE has released a list of 113 courses that students after 12th in each stream can pursue. That list can be accessed here: http://cbse.nic.in/newsite/index.html

Neverthless, after your 12th in Commerce, you can opt for CA, CS, B,Com, B.Com (//B.Com) LLB, BBA, BMS, BBS, Journalism and Mass Communication, etc.

CA and CS are the professional courses that never run out of oportunities for students.