S.No.	LIST-I Colour	S.No.	LIST-2 compound
A)	Prussian blue	P)	${\left[\mathrm{Fe}(\mathrm{CN}{)}_5\mathrm{NOS}\right]}^{4-}$
B)	Violet	Q)	${\mathrm{Fe}}_4{\left[\mathrm{Fe}(\mathrm{CN}{)}_6\right]}_3$
C)	Blood red	R)	$\left[\mathrm{Fe}\right(\mathrm{SCN}){]}^{2+}$
D)	White ppt	S)	$\mathrm{AgCl}$

	A	B	C	D
1	S	P	R	Q
2	R	P	Q	S
3	P	Q	R	S
4	Q	P	R	S