Two blocks of masses `m_(i) = 2kg` and `m_(2) = 4kg` hang, over a massless pulley as shown in the figure. A force `F_(0)=100 N` acting at the axis of the pulley accelerates the system upwards Then :
A. acceleration of 2kg mass is `15 m//s^(2)`
B. acceleration of 4kg mass is `2.5 m//s^(2)`
C. acceleration of both masses is same
D. acceleration of both the masses is upward
