Correct Answer - Option 1 : (15, 81, 12)
Logic: The addition of first and third term and multiply by 3 to get the middle term.
The pattern followed here is :
Given,
(11, 57, 8)
11 + 8 = 19
19 × 3 = 57
Similarly,
(15, 81, 12)
15 + 12 = 27
27 × 3 = 81
Hence,(15, 81, 12) is the correct answer.