Compound X, $C X_{8} H X_{8} O$ , gives a yellow precipitate with $NaOI$ . On acidification the aqueous layer gives acid Y of molar mass 122 g/mol. X is subjected to Wolff-Kishner reduction to give Z. Z is

Answer: C

The acid of

M = 122

is benzoic acid,

C X_{6} H X_{5} COOH

, so X is

C X_{6} H X_{5} COCH X_{3}

. Wolff-Kishner reduction converts

C = O

CH X_{2}

giving ethylbenzene,

C X_{6} H X_{5} CH X_{2} CH X_{3}