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      Question

      The reason why a 15-day rolling average is taken to fix

      prices is insulating domestic consumers from extreme volatility in international prices. In each question below, a sentence is given with a part of it printed in bold type. That part may contain a grammatical error. Each sentence is followed by phrases (A), (B), (C) and (D). Find out which phrase should replace the phrase given in bold to correct the error, if there is any, and to make the sentence grammatically meaningful and correct. If the sentence is correct as it is and ‘ No correction is required’ , mark (E) as the answer.
      A insulating domestic consumers from Correct Answer Incorrect Answer
      B to insulating domestic consumers from Correct Answer Incorrect Answer
      C to insulate domestic consumers from Correct Answer Incorrect Answer
      D to insulating domestic consumer from Correct Answer Incorrect Answer
      E No improvement required Correct Answer Incorrect Answer

      Solution

      Here, ‘to insulate’ is correct. The reason is, ‘to insulate domestic…’. The reason why a 15-day rolling average is taken to fix prices is to insulate domestic consumers from extreme volatility in international prices.

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