Correct Answer - Option 1 : (12, 19, 40)
The pattern followed here is,
(First number + 7) = Second number, (Second number + 21) = Third number
(17, 24, 45) → 17 + 7 = 24, 24 + 21 = 45
Similarly,
Option 1 → (12, 19, 40) → 12 + 7 = 19, 19 + 21 = 40
Option 2 → (15, 20, 43) → 15 + 5 = 20, 20 + 23 = 43
Option 3 → (18, 23, 46) → 18 + 5 = 23, 23 + 23 = 46
Option 4 → (19, 26, 34) → 19 + 7 = 26, 26 + 8 = 34
‘(12, 19, 40)’ shares the same relationship as that shared by given number set.
Hence, “(12, 19, 40)” is the correct answer.