Solution:The pattern followed here is :(a, b, c) โ {(a - 1) ร (c - 1)} = b
(23, 308, 15) โ {(23 - 1) ร (15 - 1)} โ 22 ร 14 = 308
(18, 187, 12) โ {(18 - 1) ร (12 - 1)} โ 17 ร 11 = 187
Similarly,
(14, 104, 9) โ {(14 - 1) ร (9 - 1)} โ 13 ร 8 = 104
Hence, "(14, 104, 9)" is the correct answer.