LOGIC: a * B * c = (a - 1) (b - 1) (c - 1)4 * 7 * 2 = (4 - 1) (7 - 1) (2 - 1) = 3615 * 9 * 1 = (5 - 1) (9 - 1) (1 - 1) = 480Similarly;2 * 1 * 3 = (2 - 1) (1 - 1) (3 - 1) = 102Hence, 102 is the correct answer.