List-I		List-II
a)	P-V graph (T  is constant)	e)	Straight line cutting temp. axis at -273°C
b)	P-T graph (V  is constant)	f)	Rectangular Hyperbola
c)	V-t graph (P  is constant and t in ${}^{0}C$)	g)	Straight line parallel to pressure axis
d)	P-VP graph (T is constant)	h)	Straight line passing through origin

From ideal gas equation PV=nRT match list I with list II

P-V graph (T is constant): Isothermal process, $\mathrm{PV}=\mathrm{constant}$, graph is a rectangular hyperbola

P-T graph (V is constant): Guy Lussac's law, graph is a st.line passing through origin

V-t graph (P is constant): Isobaric process, here temperature axis is in celsius. So graph is a st. line cutting temp. axis at -273°C

P-VP graph (T is constant): Isothermal process, so $\mathrm{PV}=\mathrm{constant}$, graph is a a st line parallel to pressure axis