Let $A=\{1,2,\{3,4\},5\}$.Which of the following statements are incorrect and why? $\{\{3,4\}\}\subset A$

Question

$\begin{array}{1 1}(A)\;\text{Correct}\\(B)\;\text{Incorrect}\end{array} $

Answer 1

Element of $\{\{3,4\}\}$ is present in set A.

$\therefore$ The given statement is correct.

Hence (A) is the correct answer.