In mathematical logic $\wedge$ represents an AND,$\vee$ represents an OR logic, based on that we can rewrite the given expression:
$(\bar P \wedge Q)\vee(P\wedge \bar Q\vee(P\wedge Q))$
$\implies\bar PQ+P\bar Q+PQ$
$\implies Q(P+\bar P)+P\bar Q$
$\implies Q+P\bar Q$
$\implies(P+Q)(Q+\bar Q)$ (Apply distributive law, $\because A+\bar A=1$)
$\implies (P+Q)\equiv P\vee Q$
Option (C) is correct.