Mathematics · JEE I SETS

Let \( A = \{1, 2, \{3, 4\}, 5\} \). Which of the following statements is INCORRECT?

1. A
   \( \{3, 4\} \in A \)
2. B
   \( \{1, 2, 5\} \subset A \)
3. C
   \( \{\{3, 4\}\} \subset A \)
4. D
   \( \{3, 4\} \subset A \)