For a set \( \{1,2,\{1,2,3\}\} \). Which of the following statement is false? W.....

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For a set \( \{1,2,\{1,2,3\}\} \). Which of the following
\( \mathrm{P} \)
statement is false?
W.
(1) \( \{1,2\} \in\{1,2,\{1,2,3\}\} \)
(2) \( \{1,2\} \subseteq\{1,2,\{1,2,3\}\} \)
(3) \( \{1,2,3\} \subseteq\{1,2,\{1,2,3\}\} \)
(4) \( 3 \in\{1,2\{1,2,3\}\} \)


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