Match List - I with List - II :

List-I		List-II
(A)	Sphalerite	(I)	FeCO$$_3$$
(B)	Calamine	(II)	PbS
(C)	Galena	(III)	ZnCO$$_3$$
(D)	Siderite	(IV)	ZnS

Choose the most appropriate answer from the options given below :

We need to match the ores in List-I with their chemical formulas in List-II.

(A) Sphalerite: Sphalerite is the chief ore of zinc. Its chemical formula is ZnS, which matches with (IV).

(B) Calamine: Calamine is a carbonate ore of zinc. Its chemical formula is ZnCO$$_3$$, which matches with (III).

(C) Galena: Galena is the principal ore of lead. Its chemical formula is PbS, which matches with (II).

(D) Siderite: Siderite is a carbonate ore of iron. Its chemical formula is FeCO$$_3$$, which matches with (I).

Summary of matching:

(A) - (IV) ZnS

(B) - (III) ZnCO$$_3$$

(C) - (II) PbS

(D) - (I) FeCO$$_3$$

The correct answer is Option B: (A) - (IV), (B) - (III), (C) - (II), (D) - (I).