A) \[\{1,\,2\}\subset A\]
B) \[1\in A\]
C) \[\phi \notin A\]
D) \[\{1,\,2\}\in A\]
Correct Answer: D
Solution :
| [d] \[A=P\{1,2\}=\{\phi ,\{1\},\{2\},\{1,2\}\}\] From above, it is clear that \[\{1,2\}\in A\] |
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