In the carbinol system, monohydric alcohols are named as derivatives of _____.

 $\mathrm{A}\stackrel{{\mathrm{H}}_2/ \mathrm{Raney} \mathrm{Ni}}{\to }{\mathrm{CH}}_3-{\mathrm{CH}}_2-{\mathrm{CH}}_2-\mathrm{OH}$ 

 $\mathrm{A}$ is ______.

Alcohols: ($\mathrm{i}$) ${\mathrm{CH}}_{\mathrm{3}}{\mathrm{CH}}_{\mathrm{2}}{\mathrm{CH}}_{\mathrm{2}}\mathrm{OH}$, ($\mathrm{ii}$) ${\mathrm{CH}}_{\mathrm{3}}-\mathrm{CHOH}-{\mathrm{CH}}_{\mathrm{3}}$ and ($\mathrm{iii}$) ${\mathrm{CH}}_{\mathrm{3}}-\mathrm{C} ({\mathrm{CH}}_{\mathrm{3}}) (\mathrm{OH})-{\mathrm{CH}}_{\mathrm{3}}$ were treated with Lucas reagent. What results do you expect at room temperature?

$\mathrm{R}-\mathrm{OH}+{\mathrm{SOCl}}_{\mathrm{2}}\stackrel{\mathrm{Pyridine}}{\to }\mathrm{R}-\mathrm{Cl} + \mathrm{HCl} + {\mathrm{SO}}_{\mathrm{2}}$

Pyridine in the above reaction _____.