In the system shown in figure `m_(B)=4kg` , and `m_(A)=2kg` . The pulleys are massless and friction is absent everywhere. The acceleration of block `A` is.

Options

A. `10//3m//s^(2)`
B. `20//3m//s^(2)`
C. `2m//s^(2)`
D. `4m//s^(2)`

Answer

A