Select the set in which the numbers are related in the same way as are the numbers of the following set.
(NOTE: Operations should be performed on the whole numbers, without breaking down the numbers into its constituent digits.)
(12, 15, 18)
(10, 8, 6)
1
(15, 20, 25)
2
(14, 28, 14)
3
(13, 10, 17)
4
(19, 18, 1)
5
None of above