Gauri is seated second to the right of Varun. Nandu is seated adjacent to Gauri.
Case 1:

Case 2:

Payal is seated third to the right of Nandu.Tarun is seated to the immediate left of Payal.
Case 1:

Case 2:

Raju is seated second to the right of Harshi. Lalit is not an immediate neighbour of Harshi.So case 1 is invalid. Finally we have:

Raju is related to Lalit in the same way as Harshi is related to Gauri.
Raju is seated opposite to a person who is seated immediate right of Lalit. Similarly, Harshi is related Gauri.