Mahesh, Tanay, Balesh, and Riya are in the Riya house. Suddenly the light goes out and one of the boys kisses the Riya.
Riya asked who kissed me and the three men replied as:
Mahesh says Tanay did it
Tanay says Mahesh is lying
Balesh says he did not.
Just one of them is telling the truth. Who kissed the girl?