Solution:The pattern followed here is :(a, b, c) → (a +10) = b and (b + 5) = c
(3, 13, 18) → 3 + 10 = 13 and 13 + 5 = 18
(29, 39, 44) → 29 + 10 = 39 and 39 + 5 = 44
Similarly,
(16, 26, 31) → 16 + 10 = 26 and 26 + 5 = 31
Hence, "(16, 26, 31)" is the correct answer.