Assertion (A): Throttling process for real gases at initial temperature higher than maximum inversion temperature is accompanied by decrease in temperature of the gas.
Reason (R): Joule-Kelvin coefficient $\mu _{1}$ is given by $\left ( \frac{\partial T}{\partial p} \right )_{h}$ and should have a positive value for decrease in temperature during throttling process.
a. Both A and R are individually true and R is the correct explanation of A
b. Both A and R are individually true but R is not the correct explanation of A
c. A is true but R is false
d. A is false but R is true