Which of the following relations does not give the equation

Which of the following relations does not give the equation of an adiabatic process, where terms have their usual meaning?

1. P^γT^{1 - γ} = constant
2. P^{1 - γ} T^γ = constant
3. PV^γ = constant
4. TV^{γ - 1} = constant

Adiabatic equations of state are
PV^γ = constant
TV^γ–1 = constant
P^1–γT^γ = constant.