Answer:
none of these
Step-by-step explanation:
The expression:
P1/T1 = P2/T2 is a derivative of the combined gas law.
From the combination of the Boyle's and Charles's law, if the volume is taken to be constant, the pressure of the given mass of gas is directly proportional to the absolute temperature.
This is how the expression
P1/T1 = P2/T2 was obtained.