Let `a_(1) & a_(2)` are the acceleration of A & B. Let `b_(1) & b_(2)` the acceleration of C & D relative to the wedges A and B respectively, choose the right relation. (directions of `a_(1), a_(2), b_(1) & b_(2)` are shown in figure below) :

Options

A. `a_(1)-a_(2) +b_(1) -b_(2) =0`
B. `a_(1)+a_(2) - b_(1) - b_(2) =0`
C. `a_(1)+a_(2) + b_(1) + b_(2) =0`
D. `a_(1)+b_(2) = a_(2) + b_(1)`

Answer

B