Hey Chaitanya,

There are no such concessions given by the college faculty for the students pursuing CA.However on the day of  admit card collection you may be alloted a seperate date if you have CA exams on the original date of admit card collection.You may opt for other colleges with less attendance issues if you are very much focussed on CA apart form B.com.The principal/director/head of the faculty may also help you regarding these issues

Good luck!