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

$\{1,2,5\}\in A$

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$A=\{1,2,\{3,4\}, 5\}$

The statement $\{1,2,5\}\in A$ is incorrect because $\{1,2,5\}$ is not an element of $A$

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