Explanation:

Since the numbers are in the ratio is 1 : 3 : 5, let us assume that the numbers are 9 × n, 9 × 3n and 9 × 5n, where n is any natural number.

Given, the HCF of these numbers is 9. But if we observe, the HCF of these numbers would be 9n.

Hence, 9 would be the HCF if and only if n = 1. Hence, the numbers would be:

9 × 1 = 9

9 × 3 = 27

9 × 5 = 45

Hence, option 3 is the correct answer.