The correct option is Limestone.
Explanation
Minerals are broadly classified based on their composition into metallic and non-metallic categories. Metallic minerals contain metal in raw form, while non-metallic minerals do not contain extractable metals.
- Limestone is Correct: Limestone is a sedimentary rock composed primarily of calcium carbonate. It does not yield metal upon processing and is widely used as a raw material in the cement industry and as a flux in iron smelting. It is a non-metallic mineral.
- Bauxite is Incorrect: Bauxite is the principal ore of Aluminum. Since Aluminum is a metal (specifically a non-ferrous metal), Bauxite is classified as a metallic mineral.
- Manganese is Incorrect: Manganese is a metallic mineral falling under the ferrous category (containing iron). It is crucial for manufacturing steel and ferro-manganese alloys.
- Copper is Incorrect: Copper is a malleable and ductile metallic mineral (non-ferrous) used extensively in electrical and electronics industries.
Key Takeaway: Minerals are distinctively categorized as Metallic (sub-divided into Ferrous like Iron, Manganese; and Non-Ferrous like Copper, Bauxite) and Non-Metallic (e.g., Limestone, Mica, Gypsum, Potash).