(a) explain the menaing of the statement electric charge of a body is quantised
(b) why can one ignore quantisation of electric charge when dealing with macrosocpic large scale charges

Explanation

In macroscopic or large scale charges , the charges used are huge as compared to the magnitude of electric charge . Hence , quantization of electric charge of no use on macroscopic scale . Therefore it is ignored and it is considered that electric charge is continuous.