The order of solubility of alkanols in water is

Which of the following compounds on oxidation gives ethyl methyl ketone?

$A$ toxic compound $A$ when reacted with $NaCN$ in aqueous acidic medium yields an edible cooking component and food preservative $B$. $B$ is converted to $C$ by diborane and can be used as an additive to petrol to reduce emission. $C$ upon reaction with oleum at $140^{\circ} C$ yields an inhalable anesthetic $D$. Identify $A, B, C$ and $D$,respectively.

$0.44 \ g$ of a monohydric alcohol when added to methylmagnesium iodide in ether liberates $112 \ cm^{3}$ of methane at $S.T.P.$ With $PCC$,the same alcohol forms a carbonyl compound that answers the silver mirror test. The monohydric alcohol is:

Which of the following is a secondary benzylic alcohol?

The correct order of boiling point for primary $({1^o}),$ secondary $({2^o}),$ and tertiary $({3^o})$ alcohols is