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The two sets of numbers each containing three terms is in AP; such that the sum of each set is 15. The difference between the common differences of the numbers of two sets is 1 and the ratio of the product of two sets is 7 : 8. The sets of numbers in two sets are.

A)  (4, 6, 8 & 5, 6, 7)

B)  (3, 5, 7 & 4, 5, 6)

C)  (2, 4, 6 & 3, 4, 5)

D)  (5, 7, 9 & 6, 7, 8)

E)  None of these