An ideal gas expands isothermally from volume `V_(1)` to `V_(2)` and is then compressed to original volume `V_(1)` adiabatically. Initialy pressure is `P_(1)` and final pressure is `P_(3)`. The total work done is `W`. Then
A. `P_3 gt P_1,W gt 0`
B. `P_3 lt P_1,W lt 0`
C. `P_3 gt P_1,W lt 0`
D. `P_3=P_1,W=0`