B.Com

This is dependent on the college that you pursue the course from.

Check this link:
https://www.shiksha.com/accounting-commerce/articles/course-options-after-b-com-blogId-12939

The best college is SRCC but the cut-off is quite high.

HI Dinesh,
After B.Com, you can pursue MS Finance, MS Accounts, MS management etc. As for CMA, you can do CMA USA course even in India and there is no need to travel all the way to US for this. Every state in US also has different norms for CMA. Secondly, atleast two years work experience is required to pursue the CMA program. You can decide accordingly.

Yes, you are eligible for B.Com, BBA and MBA as maths does not play important role. Your overall percentage should be good.

MBA is the best option provided you do it from a good college.

No, it's perfectly normal to have a gap between undergraduate degree and MBA. In fact it's a good idea to gain some work experience before going for MBA.