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  1. Which of the following is equivalent to x?

    2. A.
    x EX-OR 0
    B.
    x EX-NOR 0
    C.
    1 NOR x
    D.
    x AND x

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    Answer : Option B

    Explanation :

    Truth table of X-NOR gate :

    i.e. when an input to the X-NOR gate is '0' then the other input to the gate is complemented at the output.

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