Which of the following formulas indicate the ideal gas law?

The ideal gas law is represented by the formula PV = nRT, where P is the pressure of the gas, V is its volume, n is the number of moles of the gas, R is the ideal gas constant, and T is the absolute temperature in Kelvin. In the expression provided, the use of PV = knT or PV = RnT shows a relationship that aligns with the principles of the ideal gas law.

In the first part, PV = knT relates pressure and volume to temperature with a proportionality constant, which is valid in the context of specific conditions such as constant moles of gas. The second part, PV = RnT, explicitly includes the ideal gas constant, reaffirming the proper components of the ideal gas law.

Thus, this option encapsulates the essential relationship described by the ideal gas law, making it the correct choice.