HI Dear, 

it is not compulsory that you have to do B.com with CA . you can also do B.A.LL.B , most of the students choose B.com with CA because most of the syllabus of B.com is similar to the CA . 

i hope this information is hlepful for you 

for more queries just contact with us 

thank you 

good luck

Hello Sanchit
No its not mandatory to do B. Com with CA. You can do law as well with CA. But CA is a tough course to do. B. Com is quite easy then law. So it will be easy for you to do CA and B. Com together then CA and law together.
Best of luck