A) \[P-(Q~\bigcup R)=\left( P-Q \right)~\bigcap \left( P-R \right)\]
B) \[(P\Delta Q)\Delta R=P\Delta (Q\Delta ~R)\]
C) \[(P~\bigcup Q\bigcup ~R)'=P'\bigcap Q'\bigcap ~R'\]
D) P - (Q - R) = (P - Q) ? R
E) None of these
Correct Answer: C
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