6 : 18 :: 4 : ?

A) 2

B) 6

C) 8

D) 16

Multiply the first number by 3 → 6 × 3 = 18

Apply same logic: 4 × 3 = 12 → but 12 is not an option

Try squaring: 6² = 36 → not helpful

Try 6 × 3 = 18 → maybe 4 × 2 = 8

Correct Answer: (c) 8