Which one of the following is an example of both an igneous as well as a metamorphic rock?

  1. A. Gabbro
  2. B. Geyserite
  3. C. Gneissoid
  4. D. Granite

Correct Answer: C. Gneissoid

Explanation

Gneissoid rocks exhibit characteristics of both igneous and metamorphic rocks, often formed when an igneous rock undergoes partial metamorphism.

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