Haloform reaction with ${\mathrm{I}}_2$ and $\mathrm{KOH}$ will be responded by

The correct order of reactivity for the addition reaction of the following carbonyl compounds with ethylmagnesium iodide is

For the reaction below, the product is $Q.$

The compound $\mathrm{Q}$ is

The compound, which evolves carbon dioxide on treatment with aqueous solution of sodium bicarbonate at $25°\mathrm{C},$ is

Identify ' $\text{'}{\mathrm{M}}^{\text{'}}$ in the following sequence of reactions