Basic set notation

The union, complement, and intersection of sets.

Problem

Let X and Y be the following sets:
X, equals, left brace, 9, comma, 25, right brace
Y, equals, left brace, 1, comma, 4, comma, 9, comma, 16, comma, 25, right brace
Which of the following is the set $X \setminus Y$?
Please choose from one of the following options.