An ideal gas of mass `m` in a state `A` goes to another state `B` via three different processes as shown in Fig. If `Q_(1), Q_(2)` and `Q_(3)` denote the heat absorbed by the gas along the three paths, then
A. `Q_(1)ltQ_(2)ltQ_(3)`
B. `Q_(1)ltQ_(2)=Q_(3)`
C. `Q_(1)=Q_(2)ltQ_(3)
D. `Q_(1)gtQ_(2)gtQ_(3)`