The logic followed is: Logic: There are six persons sitting in a row. We have to go through all the conditions and have to make a sitting arrangement. Gopi and Piyush are sitting at the ends. Mohan is sitting left Gopi. Therefore, Gopi must be sitting on the right end.
Piyush
─────
─────
─────
Mohan
Gopi
Now, Shreya and Monika are sitting at the centre. Only one place will be remain in which Rahul must be sitting. So, there can be two cases.
Case1:Piyush
Rahul
Shreya
Monika
Mohan
Gopi
Case2:Piyush
Rahul
Monika
Shreya
Mohan
Gopi
As it can be seen that in both cases Rahul is sitting right of Piyush.Therefore, the correct answer is "Rahul".