CPA

CPA, I believe is a Certified Public Accountant, is a professional course which is different from Chartered Accountant(CA) or Chartered Professional Accountant. As far as I am concerned, any professional course does not need any degree from any college(Being it a graduation or post-graduation). But do take an advice from an expert regarding the same. Apart from this, your post-graduation will not be affected by any professional course. In fact, it will add value to your work-experience. All you need to do is manage your time effectively and efficiently but I would suggest you to pursue one thing at a time.

Any extra qualification will surely have value addition. You can also do many specialisation certification or diplomas to add more value depend upon the area of work you are focussed

Hi
There has been no mou between ICAI and CPA USA as yet so you need to go through a rigorous process to be CPA. All your queries will be answered here:
http://www.charteredclub.com/cpa-us/

actually ca is better in india
but from acca and cpa its acca

Regarding this you need to mail icai helpline(only if they permit) and the another party(only if they allow) to do so because it depends only on them. !