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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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