# Basic set notation

### Problem

Let X and Y be the following sets:
X, equals, left brace, 1, comma, 6, comma, 2, comma, 3, comma, 14, right brace
Y, equals, left brace, 2, comma, 9, comma, 13, comma, 1, right brace
Which of the following is the set $X \cup Y$?
Please choose from one of the following options.