To find the ratio of A to B given that 15% of A is double of 30% of B, we can set up the following equation:

- 0.15A = 2 * 0.30B
- Simplifying gives: 0.15A = 0.60B
- Dividing both sides by 0.15: A = 4B

Now, derive the ratio:

- A : B = 4 : 1

Options evaluated:

- Option 1, 1:2 - Incorrect
- Option 2, 2:1 - Incorrect
- Option 3, 1:4 - Incorrect
- **Option 4, 4:1 - Correct** ✅

**YOUR ANSWER IS RIGHT**