Calcium acetate,on heating,gives:

Identify product $Z$ in the following reaction sequence:
$CH_2=CH-CH_2Br$ $\xrightarrow{NaCN} Y$ $\xrightarrow[1. C_6H_5MgBr, \text{diethylether}]{2. H_3O^{+}} Z$

For the reaction below, the structure of the product $Q$ is:

Identify the product obtained when benzonitrile is reduced by stannous chloride $(SnCl_2)$ in the presence of hydrochloric acid $(HCl)$,followed by acid hydrolysis.

Which of the following reactions will produce $R-CO-Ar$?

Match List-$I$ with List-$II$.

$A$. $C_6H_5COCl + H_2 \xrightarrow{Pd-BaSO_4} C_6H_5CHO$	$I$. Gattermann-Koch reaction
$B$. $CH_3CN + SnCl_2 + HCl \rightarrow CH_3CHO$	$II$. Etard reaction
$C$. $C_6H_5CH_3 + CrO_2Cl_2 \rightarrow C_6H_5CHO$	$III$. Stephen reaction
$D$. $C_6H_6 + CO + HCl \xrightarrow{AlCl_3} C_6H_5CHO$	$IV$. Rosenmund reaction

Choose the correct answer from the options given below.