Identify the reaction shown in the image:
$C_6H_5CN \xrightarrow[(ii) H_3O^+]{(i) SnCl_2 + HCl} C_6H_5CHO$

Match the following:
| List-$I$ | List-$II$ |
| :--- | :--- |
| $(A)$ Acid chloride to aldehyde | $(I)$ $DIBAL-H$ |
| $(B)$ Benzene to benzaldehyde | $(II)$ $CO, HCl, \text{anhyd. } AlCl_3$ |
| $(C)$ Acetylene to aldehyde | $(III)$ $HgSO_4, H_2SO_4$ |
| $(D)$ Ester to aldehyde | $(IV)$ $H_2, Pd-BaSO_4$ |

The molecular formula of the final product of the following synthetic scheme is:

$R-CN \xrightarrow[(ii) H_3O^{+}]{(i) SnCl_2 + HCl} R-CHO$
What is the name of the above reaction?

Nitriles are reduced to corresponding imine with stannous chloride in the presence of hydrochloric acid,which on hydrolysis gives the corresponding aldehyde. This reaction is called:

Identify $P$ and $R$ in the given reaction sequence:
$Toluene$ $\xrightarrow[(2) H_3O^+]{(1) CrO_2Cl_2} P$ $\xrightarrow{R} Benzoic \ acid$