Two identical blocks 'A' and 'B' each of mass 5kg are connected with an ideal string and placed on a rough horizontal table having coefficient of friction (mu = `0.4`) third block of mass 'm' are connected to block 'B' with another ideal string which is passing over a ideal pully as shown in figure.The minimum value of mass of block 'C' such that blocks just starts moving is (g= `10` m/`s^2`)

Options

A. `2` kg
B. `1` kg
C. `4` kg
D. `3` kg