Column-I (Crystal system)		Column-II (Axial parameters)
I	Monoclinic	a)	$\mathrm{a}=\mathrm{b}\ne \mathrm{c}; \mathrm{\alpha }=\mathrm{\beta }={90}^{\mathrm{o}},\mathrm{\gamma }={120}^{\mathrm{o}}$
II	Hexagonal	b)	$\mathrm{a}=\mathrm{b}=\mathrm{c}; \mathrm{\alpha }=\mathrm{\beta }=\mathrm{\gamma }\ne {90}^{\mathrm{o}}$
III	Orthorhombic	c)	$\mathrm{a}\ne \mathrm{b}\ne \mathrm{c}; \mathrm{\alpha }=\mathrm{\gamma }={90}^0, \mathrm{\beta }\ne {90}^{\mathrm{o}}$
IV	Trigonal	d)	$\mathrm{a}\ne \mathrm{b}\ne \mathrm{c}; \mathrm{\alpha }=\mathrm{\beta }=\mathrm{\gamma }={90}^{\mathrm{o}}$

 

 

 

 

 

 

Correct match is

	I	II	III	IV
1)	a	c	d	b
2)	c	a	d	b
3)	c	d	b	a
4)	a	d	b	c