Correct option is B
Given:
Eight people are sitting at a square table.
Tina is sitting opposite Urmila, who is sitting between Sharda and Nita.
Sharda is diagonally opposite Priya, who is sitting to the right of Vijaya.
Vijaya is facing Madhu, who is to the right of Rita.
From the above information the seating arrangement will be:

Hence, Rita is sitting opposite to Nita.
Option (b) is the correct answer.