Hello Sangeeta, 

First of all congratulation for performing well in your exams. But with the rank of 50 in the OBC Category your chances seems to be very less as the total number is only 120. Out of 120, 57 are for general category and rest for reserved. There is no announcement regarding the seat distribution in unreserved category but still the remaining 63 seats need to be distributed among SC, ST OBC, PWD etc. Still hope for the best because if around 28 people from OBC category take admission through open category rank then you will definitely get a seat in IIM INDORE.

I hope you will find my answer helpful. 

All the best.