Raj finished before Mohit but behind Gaurav. so, the order is Gaurav, Raj, Mohit.
Ashish finished before Sanchit but behind Mohit. So, the order is Mohit, Ashish, Sanchit.
Thus, the full order is Gaurav, Raj, Mohit, Ashish, Sanchit. Clearly, Gaurav won the race.