English Grammar find the error in given sentence

the number of /(a)troops allotted for/(b) a task were improper/(c)no error/(d). - the number of / (a) troops allotted for / (b) a task were improper / (c) no error / (d). - find the error in given sentence English Grammar in hindi,  Spot the error  question answers in hindi pdf   questions in hindi, Know About English Grammar online test English Grammar notes in hindi quiz book