My academic scores 10th in 56% and 12th in 74.5% and complete CA. Am I eligible for IIM Ahmedabad MBA?

The two-year Post-graduate Programme in Management (PGP) at IIM Ahmedabad is a full-time residential course for graduates of all disciplines who desire to pursue a management career. 

Seeing the eligibility criteria which state that you must have a bachelor's degree with at least 50% marks or equivalent CGPA (this is relaxed to 45% for Scheduled Caste (SC), Scheduled Tribe (ST), and Persons with Disabilities (PwD) candidates).

Therefore, you are qualified for IIM A.

IIM A and B give so much importance to past academics that applicants with comparable academic credentials are rarely even called. There are, however, students who gain admission to these colleges due to an exceptional Profile or CAT score.