If 5 × 4 = 16, 7 × 8 = 60 and 6 × 5 = 27, then 8 × 4 is equal to:

Concept followed : a × b  =  (a + 3) × (b – 2)

⇒ 5 × 4

      ↓

(5 + 3) × (4 - 2) = 8 × 2 = 16

⇒ 7 × 8

      ↓

(7 + 3) × (8 - 2) = 10 × 6 = 60

Similarly,

⇒ 8 × 4

      ↓

(8 + 3) × (4 - 2) = 11 × 2 = 22

So, correct answer is option (4).