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Q.15 In the circuit shown in the figure, if C = 0, the expression for Y is

1. Y = A̅B̅ + A̅B
2. Y = A + B
3. Y = A̅ + B̅
4. Y = AB

Correct answer: Y = A + B

Solution

The expression Y = A + B indicates that the output is true if either A or B is true, which aligns with the behavior of an OR gate. Since C = 0 implies that it does not influence the output, the circuit simplifies to just considering the inputs A and B.

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