For the sequence of reactions A xrightarrow{C | vedclass

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(C) The reaction of a Grignard reagent $(RMgX)$ with a carbonyl compound followed by hydrolysis yields an alcohol. To obtain $	ext{tert-pentyl alcoho

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acetone

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(C) The reaction of a Grignard reagent $(RMgX)$ with a carbonyl compound followed by hydrolysis yields an alcohol. To obtain $	ext{tert-pentyl alcohol}$ $(CH_3CH_2C(CH_3)_2OH)$,we need to react a ketone with a Grignard reagent. Here,the Grignard reagent is $C_2H_5MgI$ (ethylmagnesium iodide). When $C_2H_5MgI$ reacts with $A$ (acetone,$CH_3COCH_3$),the nucleophilic ethyl group attacks the carbonyl carbon of acetone. $CH_3COCH_3 + C_2H_5MgI ightarrow CH_3C(OMgI)(CH_3)(C_2H_5)$. Upon hydrolysis with $H_2O/H^+$,this forms $CH_3C(OH)(CH_3)(C_2H_5)$,which is $2-$methylbutan$-2-$ol,commonly known as $	ext{tert-pentyl alcohol}$. Therefore,compound $A$ is acetone.

List-$I$	List-$II$
$A$. Benzaldehyde	$i$. Phenolphthalein
$B$. Phthalic anhydride	$ii$. Benzoin condensation
$C$. Phenyl benzoate	$iii$. Oil of wintergreen
$D$. Methyl salicylate	$iv$. Fries rearrangement

For the sequence of reactions $A$ $\xrightarrow{C_2H_5MgI} B$ $\xrightarrow{H_2O / H^{+}} \text{tert-pentyl alcohol}$. The compound $A$ in the sequence is

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