The correct order of increasing basicity of the given conjugate bases $(R = CH_3)$ is

Question

( A ) $RCO\bar{O} < HC = \bar{C} < \bar{R} < \bar{N}H_2$
( B ) $RCO\bar{O} < HC \equiv \bar{C} < \bar{N}H_2 < \bar{R}$
( C ) $RCO\bar{O} < \bar{N}H_2 < HC \equiv \bar{C} < \bar{R}$
( D ) $\bar{R} < HC \equiv \bar{C} < RCC\bar{O} < \bar{N}H_2$