I am going to complete my 12. My boards are from march 2014 of CBSE board. I am confused what else I can choose with my DOEACC O.

I am from CBSE board, my 12th exams are from 1st to 22nd march and I will get my result in the end of may. I have chosen to do DOEACC 'O' Level and then 'A'. Now I am confused about what else can I do while doing 'O' level or if nothing should I choose 'B' Level DOEACC or some other course like MCA.