Hi dear!! Hope you are doing well!! Yes,you can surely pursue C.A. while doing B.com hons. C.A is a professional course,the subjects you need to study in C.A are somewhat in your b.com course also. So you don't need to worry as you can pursue C.A while studying b.com without any problem. You will just need to divide your time and give your time to both the courses.

Hope you come out with great success!! All the best!!