As long as you fulfill all the criteria required to get admission to IIM Ahmedabad, your academic background does not matter. That being said, here are the requirements to get shortlisted for IIM Ahmedabad admission.
Anyone who has fulfilled the above criteria is eligible to get admission to IIM Ahmedabad. What actually matters is your performance in GD/PI. However, it’s important to note that the above criteria are general and the chances of admission depend on the individual profiles and performances. Fulfilling these criteria increases your chances of admission to IIM Ahmedabad but does not guarantee it.
An extra point to remember for you is that you will be getting diversity points because of your BSC background. This will help you get admission even with a low CAT score compared to engineering or BCom students. AS An BSc student, you will have to make the interviewers believe that you ha always targeted an MBA and not an MSc.
Honestly, anyone with a decent profile can pursue MBA from IIM Ahmedabad. The question is how well you can score in your CAT. Anything below 96 is not accepted.
Another tip that will help you get selected for MBA from IIM Ahmedabad is to make good use of your Bachelor years. You can:
Study Economics and Business alongside BSc
Participate in National & University level Business Case Study Competitions
Enhance your English speaking skills
To prepare for the interviews, read newspapers, articles and essays on current economic issues. Lastly, answer all the questions confidently.