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 XYX \setminus Y?
Please choose from one of the following options.