Correct option is
D 
From the first law of thermodynamics, 
But for adiabatic process, 
![\[\begin{array}{l} \mathrm{dU}=\mathrm{dW} \\ \mathrm{d} \mathrm{U}=\mathrm{nC}_{r} \mathrm{dT} \\ \mathrm{dW}=-\mathrm{PdV} \\ \mathrm{nC}_{\mathrm{r}} \mathrm{dT}=-\mathrm{PdV} \Rightarrow \mathrm{nCr} \mathrm{d} \mathrm{T}+\mathrm{P} \mathrm{dV}=0 \end{array}\]](https://www.learnatnoon.com/s/wp-content/ql-cache/quicklatex.com-7abbeca6bf8d7a64472407c0dc1a11dc_l3.png "Rendered by QuickLaTeX.com")
Pressure-temperature relationship for an ideal gas undergoing adiabatic change is:
![\[\gamma=C_{\mathrm{p}} / C_{\mathrm{v}}\]](https://www.learnatnoon.com/s/wp-content/ql-cache/quicklatex.com-d2e136346257568b10cc46690547e2d5_l3.png "Rendered by QuickLaTeX.com")
A
B
c
D
Correct option is
D
From the first law of thermodynamics,
But for adiabatic process,
