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      Question

       Choose the correct phrase from the options to improve

      the sentences given below. If the sentence is correct and no improvement is required, select ‘E’ as your answer. X-ray wavelengths are shorter than UV rays and typically longer than gamma rays.
      A shorter than those of UV rays and typically longer than those of Correct Answer Incorrect Answer
      B shorter than UV rays and typically longer than those of Correct Answer Incorrect Answer
      C shorter than that of UV rays and typically longer than that of Correct Answer Incorrect Answer
      D shorter than that of UV rays and typically longer than Correct Answer Incorrect Answer
      E No improvement required Correct Answer Incorrect Answer

      Solution

      Here, the wavelengths should be compared. So, ‘those of’ should be inserted before both ‘UV rays’ and ‘gamma rays’. X-ray wavelengths are shorter than those of UV rays and typically longer than those of gamma rays.

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