The state of a gas can be described by quoting the relationship between
(a) pressure, volume, temperature
(b) temperature, amount, pressure
(c) amount, volume, temperature
(d) pressure, volume, temperature, amount
(d)
The state at a gas can be described by quoting the relationship between pressure, volume, temperature and amount. ideal gas equation is
pV = nRT
Thus, p, V, T and n describe the state of the system.