__________ is not an important refinery process for upgrading the quality of lubricating oil. Options: A . &nbspDeoiling B . &nbspSolvent refinning C . &nbspClay treatment D . &nbspHydrotreatment

__________ is not an i

Question

__________ is not an important refinery process for upgrading the quality of lubricating oil.

Options:

A . Deoiling

B . Solvent refinning

C . Clay treatment

D . Hydrotreatment

Answer: Option A

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