Going by previous years data, 51 marks is approximately a rank of 35500. Going by the previous years, with this rank, you have a chance in:

Cambridge Institute of Technology: Information Science and Engineering

Coorg Institute of Technology: Mechanical Engineering

Christ-Kengeri Campus: Civil Engineering

GSSS Institute: CSE

Now this is 2019 data and cut offs change every year. For a clear picture of the Colleges that you might have a shot at with this score, please use our College predictor: