Question
A solution of optically active $1$ -phenylethanol racemizes in acidified aqueous medium. It is due to

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$(A)$ $\mathrm{N}_2 \mathrm{O}$ $(B)$ $\mathrm{N}_2 \mathrm{O}_3$ $(C)$ $\mathrm{N}_2 \mathrm{O}_4$ $(D)$ $\mathrm{N}_2 \mathrm{O}_5$

$N{H_4}^ + + {S^{ - 2}} \rightleftharpoons N{H_3} + H{S^ - }$
