Six kids are sitting in two rows facing north. Their names are Fuji, Ukain, Yam and Krish, Charlie. Mac. Fuji and Mac are sitting diagonally opposite. Ukain is in the top row and to the immediate right of Fuji. Krish is second to the left of Mac while Yam and Krish are not in the same row.
Who is sitting diagonally opposite to Yam?

Six kids are sitting in two rows facing north.

Ukain is in the top row and to the immediate right of Fuji.

Krish is second to the left of Mac

So, we will get as follows:

____   _____   _____

Krish  _____   Mac

Fuji and Mac are sitting diagonally opposite

Fuji   Ukain ____

Krish _____ Mac

Yam and Krish are not in the same row.    

Hence we will get the final arrangement as follows:

Fuji     Ukain   Yam

Krish  Charlie  Mac

Diagonally opposite to Yam will be Krish.