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A ghani or kolhu is

  • A.A continuous screw press
  • B.A solvent extraction vessel
  • C.A refining vessel for degumming
  • D.A traditional mortar and pestle expeller

Answer: D

It works the seed slowly between a rotating pestle and a fixed mortar, and its low speed keeps the oil cool. Yields are low by modern standards but the oil is prized in some markets for its flavour and keeping quality.

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