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An example of a rock formed by wood subjected to pressure and heat is?

An example of a rock formed by wood subjected to pressure and heat is?
Take Free Practice Test On 2026 JAMB UTME, Post UTME, WAEC SSCE, GCE, NECO SSCE
  • A Sandstone
  • B Biotite
  • C Granite
  • D Lignite
Correct Answer: Option D
Explanation:

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