Match the following 

	List-I (reaction)		List-II (Slope of the graph in  Ellingham diagram)
A)	${\mathrm{C}}_{\left(\mathrm{s}\right)}+{\mathrm{O}}_{2\left(\mathrm{g}\right)}\to {\mathrm{CO}}_{2\left(\mathrm{g}\right)}$	a)	Postive slope
B)	$2{\mathrm{C}}_{\left(\mathrm{s}\right)}+{\mathrm{O}}_{2\left(\mathrm{g}\right)}\to 2{\mathrm{CO}}_{\left(\mathrm{g}\right)}$	b)	Negative slope
C)	$2{\mathrm{CO}}_{\left(\mathrm{g}\right)}+{\mathrm{O}}_{2\left(\mathrm{g}\right)}\to 2{{\mathrm{CO}}_2}_{\left(\mathrm{g}\right)}$	c)	Almost zero
D)	$2{\mathrm{Fe}}_{\left(\mathrm{s}\right)}+{\mathrm{O}}_{2\left(\mathrm{g}\right)}\to 2{\mathrm{FeO}}_{\left(\mathrm{s}\right)}$	d)

The correct match is

	(A)	(B)	(C)	(D)
1)	c	b	a	a
2)	b	c	a	d
3)	a	b	c	d
4)	c	d	a	b