# The volume - temperature graphs of a given mass of an ideal gas at constant pressures are shown below. What is the correct order of pressures?

$(a)\; P_1 > P_3 > P_2$

$(b)\; P_1 > P_2 > P_3$

$(c)\; P_2 > P_3 > P_1$

$(d)\; P_2 > P_1 > P_3$

$(a)\; P_1 &gt; P_3 &gt; P_2$