Select the incorrect statement about the specific heat of a gaseous system :
A. Specific heat at no heat exchange condition, `C_(A)=0`
B. Specific heat at constant temperature, `C_(T)=oo`
C. Specific heat at constant pressure, `C_(P)=(gammaR)/(gamma-1)`
D. Specific heat at constant volume, `C_(V)=(R)/(gamma)`
