The ratio of the ages of a father and his son 10 years hence is 5:3. While 10 years ago, it was 3:1. The ratio of the ages of the son to that of his father today is

• A. 1:2
• B. 1:3
• C. 2:3
• D. 2:5

• 1:2

Please select one of the options to reveal the correct answer.