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

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(A) Given the set $A = \{1, 2, \{3, 4\}, 5\}$.
The elements of set $A$ are $1$,$2$,$\{3, 4\}$,and $5$.
The statement $\varnothing \in A$ is incorrect because the empty set $\varnothing$ is not listed as an element within the set $A$.

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