If $A, B$ and $C$ are three sets such that $A \cap B=A \cap C$ and $A \cup B=A \cup C$, then

If $A, B$ and $C$ are three sets such that $A \cap B=A \cap C$ and $A \cup B=A \cup C$, then
  1. $A=B$
  2. $A=C$
  3. $B=C$
  4. $A \cap B=\phi$

Solution

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Asked in: JEE Main 2009

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