Which of the following amines does not react with acetyl chloride?

Identify the product $C$ in the series:
$CH_3CN$ $\xrightarrow{Na/C_2H_5OH} A$ $\xrightarrow{HNO_2} B$ $\xrightarrow{copper, 573 \ K} C$

$A$ compound $X$ with formula $C_4H_{11}N$ reacts with $HNO_2$ to liberate nitrogen and produce compound $Y$. The compound $Y$ on treatment with $I_2 / NaOH$ produces a sodium salt of a carboxylic acid. The compound $X$ is

Chloroform when treated with aniline and alcoholic $KOH$ gives:

Deamination (or) diazotization of $n$-butylamine $(CH_3CH_2CH_2CH_2NH_2)$ with $NaNO_2/HCl$ gives how many isomeric butenes?

The mass of benzanilide obtained from the benzoylation reaction of $5.8 \ g$ of aniline,if the yield of product is $82\%$,is . . . . . . $g$ (nearest integer).
(Given molar mass in $g \ mol^{-1}$: $H: 1, C: 12, N: 14, O: 16$)