B.Com

Option 1: CA with correspondence B.Com
Pros:
1. You will have a lot of time to attend CA coaching, self-study and focus solely on CA.
2. There will be no attendance hassles.
3. Even, if you can't clear CA in first attempt you will at least get a graduation degree.
Cons:
1. If you are unable to clear CA after the completion of B.Com. I seriously doubt if finding a job with a correspondence B.Com degree will be easy.
2. Until and unless done from a good institute a correspondence graduation will not help in shaping your career in any way.
Option 2: Regular B.Com from DU & CA
Pros:
1. You will get a reputed graduation degree and even if their attendance is compulsory the studies will only help you with those common subjects.
2. In case, you are unable to clear CA in first attempt a good graduation will help you in landing job. You will then have options to consider alternate career choices such as CS, CFA, Actuaries, etc.
Cons:
1. You will need to really work on time management, as it will drain out energy and you will need to work twice as hard to pull these two things together.
2. It will not leave you the time (to party with friends and socialize) as compared to your other friends and may make you feel frustrated. But, you must remember that once you make it through you will not even remember these 2-3 years and in the longer run in life, it will not really matter.