Correct Answer: Option B
(20 x 16) women can complete the work in 1 day.
So, 1 woman's 1 day's work =1/320.
(16 x 15) men can complete the work in 1 day.
So, 1 man's 1 day's work = 1/240.
So, required ratio = 1/240 : 1/320
=> 1/3 : 1/4
= 4 : 3 (cross multiplied)
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