Answer:a) Each is at same temperature
Explanation:
According to the zeroth law of thermodynamics when two objects are in thermal equilibrium with the third one then they are at thermal equilibrium with each other thus they all are at the same temperature.
Here Also objects are in thermal Equilibrium then they should be at the same temperature.
As Internal Energy is an Extensive Property that depends on the amount of gas Present thus two gases at thermal Equilibrium can have different Temperatures.