157. (7-1 2013 8-1)-1 2013 (3-1 2013 4-1)-1 Is Equal To (A)\T56\T(B)\T44 (C)\T50\T(D)\T48

157. (7-1 – 8-1)-1 – (3-1 – 4-1)-1 is equal to (a) 56 (b) 44 (c) 50 (d) 48

 

zero(0) is the answer.