A system consists of three masses `m_(1),m_(2) " and " m_(3)` connected by a string passing over a pulley P. The mass `m_(1)` hangs freely and `m_(2) " and " m_(3)` are on a rough horizontal table (the coefficient of friction=`mu`). The pulley is frictionless and of negligible mass. The downward acceleration of mass `m_(1)` is (assume, `m_(1)=m_(2)=m_(3)=m`)

Options

A. `g(1+gmu)/9`
B. `2gmu/3`
C. `g(1-2mu)/3`
D. `g(1-2mu)/2`