The intensive thermodynamic variables among the following are:
P. Pressure
Q. Volume
R. Temperature
S. Enthalpy

P. Pressure is an intensive variable because it remains the same regardless of the system's size or quantity.
Q. Volume is an extensive variable because it depends on the size or amount of the system.
R. Temperature is an intensive variable because it remains constant regardless of the system's size or quantity.
S. Enthalpy is an extensive variable because it depends on the size or amount of the system.

Based on the given options, the correct answer is:
B. P, R