Reagent(s) which can be used to bring about the following transformation is(are):

In the following sequence of reactions?

$\mathrm{Toluene} \stackrel{{\mathrm{KMnO}}_4}{\to }\mathrm{A}\stackrel{{\mathrm{SOCl}}_2}{\to }\mathrm{B}\underset{{\mathrm{BaSO}}_4}{\overset{{\mathrm{H}}_2/\mathrm{Pd}}{\to }}\mathrm{C}$

The product $\mathrm{C}$ is:

The major product obtained in the following reaction is :  

[JEE(Main)-2017, 4/120]

The main reduction product of the following compound with ${\mathrm{NaBH}}_4$ in methanol is :

The major product of following reaction is : 

$\mathrm{R}-\mathrm{C}\equiv \mathrm{N}\underset{\left(2\right){\mathrm{H}}_2\mathrm{O}}{\overset{\left(1\right) \mathrm{AlH}(\mathrm{i}-\mathrm{Bu}{)}_2}{\to }}?$

The major product $\text{'}\mathrm{X}\text{'}$ formed in the following reaction is:

The major product of the following reaction. is:

The major product of the following reaction. is: