Correct option is B
Logic:
First number = 5 × (second number + 1)
All following the logic except option b.
(a) 55:10
55 = 5 (10 + 1)
55 = 55
(b) 80:13
80 = 5(13 + 1 )
80 ≠ 70
(c)
20:3
20 = 5 ( 3 + 1)
20 = 20
(d)95:18
95 = 5(18 + 1)
95 = 95
Hence answer is (b).