In order to be successful in the Civil Services Examination  an aspirant has to work for at least 16 Hrs a day ?

While people claim long hours of study, yet it is doubtful whether 16 hours of intensive study is humanly possible. Remember it is not the number of hours that is important but the work that you put in those hours is important. Each one of us has a “span of attention” and the preparation should be tailored accordingly. There is no need to obsessed with the number of hours. In short , quality  of hours is important rather  quantity of hours