Is it very difficult for science students to do CA?

Hi Yes, it is very difficult because both are different subjects, you can choose any. One is a South pole and the other is North pole. But if someone wants to do CA after completing 12th (science stream) then definitely, he can.

That makes no sense because the basic comes under accounts and as science students, it will be Greek and Latin! But a student can always try his/her best by joining coaching classes.