Match the following 

List – I(Reaction)	List – II(Catalyst useal)
i)  $\underset{\left(g\right)}{CO}+\underset{\left(g\right)}{3H_2}\to$$\underset{\left(g\right)}{C{H}_4}+\underset{\left(g\right)}{H_{2}O}$	a) $ZnO-C{r}_2{O}_3$
ii) $CO+2H_2\to C{H}_{3}OH$	b) Cu
iii) $CO+H_2\to HCHO$	c) Ni

	i	ii	iii
1	a	b	c
2	c	b	a
3	b	c	a
4	c	a	b