Dear Kajal,
Yes, you can prepare for CA along with your graduation.
There are many students who used to do that.
If you are a student of B.Com then you will also find similarity between your syllabus.
It is a good idea to prepare along with your graduation as you will be having good options in your hand if by chance you decide to quit your CA.
So, at last it is a good option you can go for it.
Good Luck!!
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