Above compound contains four functional groups, the rate of reaction with $\mathrm{RMg}-\mathrm{X}$ will be:

Identify $\mathrm{a}$ and $\mathrm{b}$, in the following reaction:

Consider reduction of $2$-butanone.

 $\mathrm{A},\mathrm{B}$ and $\mathrm{C}$ are respectively.