Hi Archna. Well, you should opt commerce and study both economics and accountancy. And after studying both the subjects in detail, you can make your mind about which subject you want to study more and which is more interesting. If you'll fine accountancy better, then, after 12th you can prepare for the exams of CA. But, if you find economics better then you can opt some stream like b.com or b.com hons,etc and study economics more and make a career in that.