Q.

Which of the following minerals are required for smelting iron ore?

A. Limestone and gypsum
B. Manganese and limestone
C. Limestone and coal
D. Gypsum and coal
Answer» B. Manganese and limestone
Explanation: Composite volcanoes are most commonly found in island arcs. Most of them are found scattered on the islands adjoining the Pacific Ring of Fire where about 75% of Earth's volcanoes are found. It is a region of high volcanic and seismic activity that surrounds the majority of the Pacific Ocean Basin.
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