If $A$ and $B$ are two events such that $P(A \cup B) = P(A \cap B)$,then the true relation is
- A$P(A) + P(B) = 0$
- B$P(A) + P(B) = P(A)P\left(\frac{B}{A}\right)$
- C$P(A) + P(B) = 2P(A)P\left(\frac{B}{A}\right)$
- DNone of these
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