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# Phenol on exposure to air produces

$\begin{array}{1 1}(a)\;\text{O-benzoquinone}&(b)\;\text{P-benzoquinone}\\(c)\;\text{Phenoquinone}&(d)\;\text{None}\end{array}$

Phenol on exposure to air produces a red coloured product called phenoquinone.
Hence (c) is the correct answer.