Option \((b)\) is wrong, since in isothermal process
\(T = constant\)
Option \((c)\) and \((d)\) matches isothermes and adiabatic formula :
\(TV ^{\gamma-1}=\) constant and \(\frac{ T ^{\gamma}}{ p ^{\gamma-1}}= constant\)
[આપેલ : $R=8.3\, {J} /\,mole\,{K}, \ln 2=0.6931$ ] (નજીકના પૂર્ણાંકમાં)
$(3^{1.4}=4.6555)$ [હવાને આદર્શ વાયુ લો]