Which one among the following statements regarding igneous rock is <strong>CORRECT</strong>?

  1. A. When magma cools deep in the Earth's interior, it results in the formation of fine-grained igneous rocks.
  2. B. Basalt is a type of intrusive igneous rock.
  3. C. Most of the minerals of igneous rocks are silicates.
  4. D. Extrusive igneous rocks often undergo lithification.

Correct Answer: C. Most of the minerals of igneous rocks are silicates.

Explanation

Igneous rocks are predominantly composed of silicate minerals (like quartz, feldspar, and mica). Deep cooling forms coarse-grained rocks, basalt is extrusive, and lithification is a process associated with sedimentary rocks.

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