One mole of an ideal monatomic gas undergoes the following four reversible processes :
Step1 : It is first compressed adiabatically from volume `V_(1)` to `1m^(3)`.
Step 2 : then expanded isothermally to volume 10 `m^(3)`.
Step 3 : then expanded adiabatically to volume `V^(3)`.
Step 4 : then compressed isothermally to volume `V_(1)`.
If the efficiency of the above cycle is 3/4 then `V_(1)` is,

Options

A. `2m^(3)`
B. `4m^(3)`
C. `6m^(3)`
D. `8m^(3)`

Answer

D