Correct Answer - Option 3 : 77 : 24
The pattern followed here is:
Option 1 → 43 : 14 → 4 + 3 = 7 × 2 = 14
Option 2 → 85 : 26 → 8 + 5 = 13 × 2 = 26
Option 3 → 77 : 24 → 7 + 7 = 14 × 2 = 28, not 24
Option 4 → 17 : 16 → 1 + 7 = 8 × 2 = 16
Hence, '77 : 24' is the odd pair.