Column-$I$ represents a graph and Column-$II$ represents a physical quantity or condition that is constant for that graph. Match them correctly:

Column-$I$	Column-$II$
$(a)$ Top graph	$(i)$ Constant pressure
$(b)$ Bottom graph	$(ii)$ Constant volume
	$(iii)$ For ideal gas

(A-III, B-I) For an ideal gas, the equation of state is $PV = \mu RT$, which implies $\frac{PV}{\mu T} = R$. Since $R$ (the universal gas constant) is always constant for an ideal gas, the top graph showing $\frac{PV}{\mu T}$ vs $P$ as a horizontal line represents the property of an ideal gas. Thus, $(a-iii)$.
For the bottom graph, we have $\frac{V}{T}$ as a constant. According to Charles's Law, $\frac{V}{T} = \text{constant}$ when the pressure $P$ is constant. Thus, the graph represents a process at constant pressure. Thus, $(b-i)$.