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.)
(2, 8, 36)
(4, 9, 25)
1
(14, 18, 9)
2
(13, 20, 49)
3
(21, 15, 35)
4
(12, 14, 26)