An organic compound $X$ is oxidised by using acidified $K_2Cr_2O_7$ solution. The product obtained reacts with phenyl hydrazine but does not give the silver mirror test. The compound $X$ is,

Consider the following reaction,where:
$(A)$ The change in the functional group and
$(B)$ The corresponding change in the hybridization from the starting material to the final product are:
$CH_3-C \equiv N \xrightarrow[(ii) \ HI + \text{Red } P]{(i) \ SnCl_2, HCl / H_3O^{+}}$

Match the reactions in Column-$I$ with their products in Column-$II$.
| Column-$I$ (Reagents) | Column-$II$ (Product) |
| :--- | :--- |
| $(A) \ CH_3CHO + 2C_2H_5OH \xrightarrow{HCl_{(g)}} $ | $(i) \ (CH_3)_2C(OCH_2)_2$ |
| $(B) \ CH_3COCH_3 + CH_2OH-CH_2OH \xrightarrow{HCl_{(g)}} $ | $(ii) \ CH_3CH(OH)CN$ |
| $(C) \ CH_3CHO + HCN$ $\xrightarrow{OH^-}$ $\xrightarrow{H_3O^+}$ | $(iii) \ CH_3CH(OC_2H_5)_2$ |
| $(D) \ CH_3CHO + HCN \xrightarrow{OH^-} $ | $(iv) \ CH_3CH(OH)COOH$ |

Compound $(A)$ with molecular formula $C_6H_{12}O$ is optically active. Compound $(A)$ gives a negative Tollens test and a positive test with $2,4$-dinitrophenylhydrazine. Identify $(A)$.

Identify the reagents $S$ and $\mu$ in the scheme below in which $R$ is converted to the nitrile via the benzylic halide. $R, S$ and $\mu$ respectively are:

The mass of $NH_3$ produced when $131.8 \ kg$ of cyclohexanecarbaldehyde undergoes Tollen's test is $..... \ kg$. (Nearest Integer) Molar Mass of $C = 12 \ g/mol$,$N = 14 \ g/mol$,$O = 16 \ g/mol$.