Can we neglect the quantization of charge? If yes,then mention the situation.

(A) Yes,we can neglect the quantization of charge at the macroscopic level.
The step size $e$ is very small compared to the charges we deal with in daily life,which are typically of the order of a few $\mu C$.
At this scale,the fact that the charge of a body can only increase or decrease in discrete units of $e$ is not observable.
The grainy or discrete nature of the charge is lost,and it appears to be continuous.
This situation is analogous to a dotted line viewed from a distance; it appears continuous to the human eye even though it is composed of individual points.
At the macroscopic level,one deals with charges that are enormous compared to the magnitude of the elementary charge $e$.
For example,a charge of $1 \mu C$ contains approximately $10^{13}$ times the electronic charge. At this scale,the discrete nature of charge is negligible,and it can be treated as a continuous distribution.
However,at the microscopic level,where the charges involved are of the order of a few tens or hundreds of $e$,the discrete nature is significant,and quantization cannot be ignored.