Which of the following is not correct for a reversible adiabatic process?

Answer: Option D

An adiabatic process is represented by $$p{v}^{\gamma }=\text{constant}$$    now by replacing the $$p$$ with $$\frac{nRT}{v}$$  we get $$T{V}^{\gamma -1}=\text{constant}$$    and by replacing the $$V$$ with $$\frac{nRT}{P}$$  we get the equation $$P^{1-\gamma }{T}^{\gamma }=\text{constant}.$$