Select the option in which the numbers in the set share the same relationship as that shared by the numbers of the given set. (14, 18, 42)

In (14, 18, 42): 14 × 3 = 42 and 14 + 18 + 10 = 42. Checking: 14 × 3 = 42, 16 × 3 = 48 ≠ 56. Another pattern: (first + second) × k = third. 14 + 18 = 32, not 42. Actually 14 × 18 / 6 = 42. For (16, 21, 56): 16 × 21 / 6 = 56. This matches the pattern, so answer is (16, 21, 56).