An ideal gas at $27 °\mathrm{C}$ is compressed adiabatically to $\raisebox{1ex}{$8$}\!\left/ \!\raisebox{-1ex}{$27$}\right.$ of its original volume. If $\gamma =\raisebox{1ex}{$5$}\!\left/ \!\raisebox{-1ex}{$3$}\right.$, then the rise in temperature is

In which of the figure no heat exchange between the gas and the surroundings will take place, if the gas is taken along a curve?

(curves are isothermal and adiabatic)

In the following figures, four curves $A, B, C, D$ are shown the curves are:-