An ideal gas undergoes two isothermal and two adiabatic processes as shown in the figure. The temperature during isothermal process from 3 to 2 is 2T and that during process from 1 to 4 is T. If V1, V2, V3,V4 are the volumes of the gas at state 1,2,3 and 4 (refer figure) then which of the following is correct.
