Solution:The pattern followed here is :(1st number + 3rd number) × 5 = 2nd number
(5 - 70 - 9) → (5 + 9) × 5 ⇒ 14 × 5 = 70
(8 - 95 - 11) → (8 + 11) × 5 ⇒ 19 × 5 = 95
Similarly,
(6 - 135 - 21) → (6 + 21) × 5 ⇒ 27 × 5 = 135
Hence, (6 - 135 - 21) is the correct answer.