I am a commerce with CS student. Can I pursue game programming?

Yes, of course, you can do that. Game programming requires your skills of Game Development, not the stream from which you were. Hope a bright future ahead for you.

Yes, you can pursue game programming. Good luck.

You can't make your career in it. But, you can pursue it as a hobby. In that case you will have both technical and management knowledge. Based on your interest. No one can stop you from learning anything. But, if you think it as a career, then you may face some or I could say many difficulties. Hope

No. This is not your line. You must prefer to CMA or CA course.