The circuit show in the figure has 4 boxes each described by inputs P, – McqOptions

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1.	The circuit show in the figure has 4 boxes each described by inputs P, Q, R and outputs y, z withY = P ⊕ Q ⊕ R, Z = RQ + PR + QP The circuit act as a
A.	4 bit adder giving P + Q
B.	4 bit subtractor P - Q
C.	4 bit subtractor Q - P
D.	4 bit adder P + Q + R
Answer» C. 4 bit subtractor Q - P

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