Rank these gas samples according to pressure.

The question cannot be answered without any given illustration. However, I found a similar problem as shown in the attached picture. Let's see the ideal gas equation to help us evaluate:

PV = nRT

The higher the pressure:
 -  the smaller the volume
 - the higher the amount of substance
 - the higher the temperature

Assuming all systems have the same temperature, the system with higher pressure,is the one with the least volume and the most amount of substance. Let's number the given pictures from left to right, from 1 to 4. Thus, the ranking from lowest to highest pressure would be: 3,4,1,2.