What is main functional group in compound

$C{{H}_{3}}CN+2H\underset{\text{Ether}}{\mathop{\xrightarrow{HCl}}}\,X\underset{{{H}_{2}}O}{\mathop{\xrightarrow{\text{Boiling}}}}\,Y;$ the term $Y$ is:

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Given below are two statements: one is labelled as Assertion $(A)$ and the other is labelled as Reason $(R)$ :

Assertion $(A)$ : $\mathrm{S}_{\mathrm{N}} 2$ reaction of $\mathrm{C}_6 \mathrm{H}_5 \mathrm{CH}_2 \mathrm{Br}$ occurs more readily than the $\mathrm{S}_{\mathrm{N}} 2$ reaction of $\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{Br}$.

Reason $(R)$ : The partially bonded unhybridized p-orbital that develops in the trigonal bipyramidal transition state is stabilized by conjugation with the phenyl ring.

In the light of the above statements, choose the most appropriate answer from the options given below:

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The incorrect statements regarding enzymes are:

$(A)$ Enzymes are biocatalysts.

$(B)$ Enzymes are non-specific and can catalyse different kinds of reactions.

$(C)$ Most Enzymes are globular proteins.

$(D)$ Enzyme - oxidase catalyses the hydrolysis of maltose into glucose.

Choose the correct answer from the option given below:

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The highest yield of $m-$ product is possible by the electrophilic substitution of the following :

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The mixture of ethanol and water cannot be separated by distillation because