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Which one of the following options is CORRECT for the given logic circuit?

  1. $P=1, Q=1 ; X=0$
  2. $P=1, Q=0 ; X=1$
  3. $P=0, Q=1 ; X=0$
  4. $P=0, Q=0 ; X=1$
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The output expression can be written as:$X=\bar P+PQ \implies X=(\bar P+P).(\bar P+Q)$ which is equivalent to $X=\bar P+Q$

Now only option $(D)$ satisfy this equation as $X=\bar 0+0=1$
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