Hello Ankur,
Yes, you can pursue CA with B.com Honours. Make sure you choose a college where you need not to go to the college regularly because your entire schedule should be as such you can give more time to study CA course and focus on the relevant learning. You will be easily able to manage the preparation of B.com Honours during its exam time only. It's not at all hectic for a CA student to cope up with B.com.
But, if your focus is to be CA, I would advice you to go for  B.com or B.com Taxation.
Best of luck for your future..!