What is Ravi's present age? I. The present age of Ravi is half of that of his father. II. After 5 years, the ratio of Ravi's age to that of his father's age will be 6 : 11. III. Ravi is 5 years younger than his brother.

• A. I and II only
• B. II and III only
• C. I and III only
• D. All I, II and III
• E. Even with all the three statements answer cannot be determined.