A can complete a piece of work in 4 days. B takes double the time taken by A, C

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A can complete a piece of work in 4 days. B takes double the time taken by A, C takes double that of B, and D takes double that of C to complete the same task. They are paired in groups of two each. One pair takes two-thirds the time needed by the second pair to complete the work. Which is the first pair?

Options:

A . A and B

B . A and C

C . B and C

D . A and D

Answer: Option D

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