Solve this following

Question:

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. $B=C$

  2. $A \cap B=\phi$

  3. $A=B$

  4. $A=C$


Correct Option: 1

Solution:

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