Chemistry - GOC Question with Solution | TestHub

$-\mathrm{N}(\mathrm{C}{\mathrm{H}}_3{)}_2$ $\to$ –I / +M. $-{\mathrm{O}}^{-}$ $\to$ +I / +M. $-\mathrm{C}{\mathrm{H}}_3$ $\to$ +I / hyperconjugation.

$-\mathrm{C}\equiv \mathrm{N}$ $\to$ –I / –M. The nitrogen is more electronegative than carbon, so it pulls electrons through the sigma bond (–I), and the $\mathrm{C}\equiv \mathrm{N}$ π bond withdraws electrons from the attached π system (–M).

Answer: (B).