A) \[\left\{ a \right\}\text{ {I} }\left\{ a,\text{ }b,\text{ }c \right\}\]
B) \[\left\{ a \right\}\text{ }\overset{,}{\mathop{\text{I}}}\,\text{ }\left\{ a,\text{ }b,\text{ }c \right\}\]
C) \[f\text{ {I} }\left\{ a,\text{ }b,\text{ }c \right\}\]
D) None of these
Correct Answer: A
Solution :
It is obvious.
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