Which of these is a type of iron ore found in Karnataka?

The correct answer is D. All of the above.

Magnetite, hematite, and limonite are all types of iron ore found in Karnataka.

• Magnetite is a black iron oxide mineral with a high magnetic susceptibility. It is the most important iron ore and is used in the production of iron and steel.
• Hematite is a red or brown iron oxide mineral that is the most common type of iron ore. It is used in the production of iron and steel, as well as in pigments and ceramics.
• Limonite is a yellow or brown iron oxide mineral that is found in sedimentary rocks. It is used in the production of iron and steel, as well as in pigments and ceramics.

Karnataka is a state in southwestern India. It is the third most populous state in India and the ninth largest state in terms of area. The state is known for its rich mineral resources, including iron ore.