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
B shorter than UV rays and typically longer than those of
C shorter than that of UV rays and typically longer than that of
D shorter than that of UV rays and typically longer than
E No improvement required
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