Find out the reactivity order of the labeled functional groups towards $LiAlH_4$ reduction.

Carbonyl compounds can generally be converted to hydrocarbons by

$PCl_5$ reacts with propanone to give:

The $K_{eq.}$ values in $HCN$ addition to the following aldehydes are in the order:

$CH_3-C \equiv CH \xrightarrow[dil. H_2SO_4]{Hg^{+2}} (P)$,$CH_3-C \equiv CH \xrightarrow[(2) H_2O_2]{(1) BH_3, THF} (Q)$. $P$ and $Q$ can be differentiated by

The product of the reaction between ammonia and formaldehyde is