1. Old Sedimentary
  2. Old Igneous
  3. Old Metamorphic
  4. New Metamorphic
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Answer: Option 2

In old Igneous type of rocks metals like gold and copper mostly found. Gold and copper are found in ore bodies associated with porphry. Porphry is a general term applied to igneous rocks of any composition that contain conspicuous phenocrysts (crystals) in a fine-grained groundmass.

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