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In the provided logic circuit, under which condition will the LED illuminate, assuming it lights up when a high voltage is present across it?

1. A) A B Y 0 0 0 0 1 0 1 0 0 1 1 1
2. B) A B Y 0 0 1 0 1 0 1 0 1 1 1 0
3. C) A B Y 0 0 0 0 1 1 1 0 1 1 1 1
4. D) A B Y 0 0 1 0 1 1 1 0 0 1 1 0

Correct answer: B) A B Y 0 0 1 0 1 0 1 0 1 1 1 0

Solution

The truth table in option B corresponds to an XOR gate, where the output is high (1) only when the inputs A and B are different. This matches the condition for the LED to glow.

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