Greetings aspirant!

You wish to pursue CA which is a prestigious and respected profession. I want to inform you that anyone can pursue CA after 12th either a commerce student or a non- commerce student.

However commerce with maths is the best subject combination for CA. Because commerce students get basic knowledge about accountancy which is a foundational subject in CA and also maths gives and extra edge. But it's not compulsory to have maths in 12th, however you will have to work extra hard on maths because it is one of the compulsory foundational subject in CA exam.

In conclusion you can pursue CA even if you didn't opted for maths in 12th.
To know more about CA refer to the link below.

https://www.careers360.com/articles/4162-Chartered-Accountancy-CA

Hope you find it helpful. Thankyou!