If function W, X, Y and Z are as followsW = R + P Q + R

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If function W, X, Y and Z are as follows
W = R + P Q + R S
X = PQ R S + P Q R S + P Q R S
Y = RS + PR + P Q + P Q
Z = R + S + PQ + P Q R + P Q S
Then—

1. W = Z, X = Z
2. W = Z, X = Y
3. W = Y
4. W = Y = Z

Correct Option: A

For first given equation
W = R + PQ + RS
= R + RS + PQ = R + S + PQ

Now, for second given equation
X = PQRS + PQ RS + PQ RS

Thus we conclude that
W = Z, X = Z
Hence alternative (A) is the correct choice.