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There are four prime numbers written in ascending order. The product of first three is 385 and that of last three is 1001. The last number is:

A. 9

B. 13

C. 15

D. 12

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Correct Answer : B.

\frac{a b c}{b c d} = \frac{385}{1001} \Rightarrow \frac{a}{d} = \frac{5}{13}

d = 13

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