Correct option is C
Given:-
Solution :

Breaking Down the Statement:
Atul’s father’s wife → Atul’s mother.
The only brother of Atul’s mother → Atul’s maternal uncle
The son of Atul’s maternal uncle → Atul’s cousin
Rohit’s Relationship to Atul:
Since Rohit is the son of Atul’s maternal uncle, Rohit is Atul’s cousin.
Thus the correct answer is (C) Cousin