To solve this problem, we need to match the compounds in List-I with their corresponding chemical formulas in List-II.$\newline$Let's analyze each item:$\newline$• (a) Haematite is known to be an iron ore with the formula $Fe_2O_3. \newline$• (b) Magnetite is another iron ore with the formula $Fe_3O_4. \newline$• (c) Calamine is a mineral form of zinc carbonate, with the formula $ZnCO_3. \newline$• (d) Kaolinite is a clay mineral with the formula $[Al_2(OH)_4Si_2O_5]. \newline$Now, let's match these with the options provided:$\newline$• (a) Haematite matches with (iii) $Fe_2O_3. \newline$• (b) Magnetite matches with (i) $Fe_3O_4. \newline$• (c) Calamine matches with (ii) $ZnCO_3. \newline$• (d) Kaolinite matches with (iv) $[Al_2(OH)_4Si_2O_5]. \newline$Therefore, the correct matching is:$\newline$(a)->(iii), (b)->(i), (c)->(ii), (d)->(iv).$\newline$This corresponds to Option 2.