Hi nick17india,
Regarding your failed class, I recommend you read this case study on ways you can address this issue:
https://www.stacyblackman.com/comprehens ... ies/case5/
Additionally, your GMAT score looks great, however admissions teams are going to be looking beyond your numbers. They are looking to cultivate future leaders, so any leadership and management experience you can point to will be important. I recommend you read this case study of an Indian engineer who was accepted into Columbia, Tuck, and MIT:
https://www.stacyblackman.com/comprehens ... ies/case5/
Cheers,
Conrad and the Stacy Blackman Team