I,II,III are three isotherms respectively at `T_(1),T_(2)` and `T_(3)` for a fixed mass of gas, as shown in graph. Temperature will be in order :
A. `T_(1) = T_(2) = T_(3)`
B. `T_(1) lt T_(2) lt T_(3)`
C. `T_(1) gt T_(2) gt T_(3)`
D. `T_(1) gt T_(2) = T_(3)`
