In the reaction sequence, \[ \mathrm{C}_{6} \mathrm{H}_{5} \mathrm{CHO} \stackrel{\mathrm{NaCN} ...

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In the reaction sequence,
\[
\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{CHO} \stackrel{\mathrm{NaCN} / \mathrm{HCl}}{\longrightarrow}[\mathrm{X}] \stackrel{\mathrm{H}_{2} \mathrm{O} / \mathrm{H}^{\oplus} / \Delta}{\longrightarrow} \text { Product }
\]
Product will be
(a) Optically inactive acid
(b) Optically inactive \( \alpha \)-hydroxy acids
(c) Racemic mixture of two optically active \( \alpha \)-hydroxy acids
(d) Racemic mixture of two optically active secondary alcohols
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