The logic circuit shown in the original figure has inputs A and B and output C. Which truth table corresponds to the circuit?

Question

G1 Physics · Accepted Answer

From the circuit in the source figure, the first gate produces A+B and the final logic gives C = A(A+B). Using Boolean algebra, A(A+B) = A. Therefore the output depends only on A: A=0 ⇒ C=0, A=1 ⇒ C=1, independent of B. Hence the truth table is 00→0, 01→0, 10→1, 11→1. Correct option: A.