Correct Answer - Option 3 : 4 : 27
LOGIC: Second number is divisible by by First Number.
1) In 9 : 36 →
36 ÷ 9 = 4
2) In 6 : 18 →
18 ÷ 6 = 3
3) In 4 : 27 →
27 ÷ 4 = 6.75 (Not completely divisible)
4) in 10 : 50 →
50 ÷ 10 = 5
Hence, "4 : 27" is the correct answer.
