_{[ 0]}^{[ 100 ]} (tan~1x) dx

                                    Here (.) is greatest integer function (box func.)

                                     and  tan~1x  is tan inverse x

           Option :

                 

    (a) tan1-100   (b) /2- tan1  (c) 100 - tan1   (d) none of these

 

   Please post full explanation..........