(D) The chemical compositions of the given minerals are as follows:$1$. Malachite: $CuCO_{3} \cdot Cu(OH)_{2}$ (Copper ore)$2$. Cassiterite: $SnO_{2}$

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(D) The chemical compositions of the given minerals are as follows:$1$. Malachite: $CuCO_{3} \cdot Cu(OH)_{2}$ (Copper ore)$2$. Cassiterite: $SnO_{2}$ (Tin ore)$3$. Pyrolusite: $MnO_{2}$ (Manganese ore)$4$. Magnetite: $Fe_{3}O_{4}$ (Iron ore)Therefore,$Magnetite$ is a mineral of iron.