Read the question below:What is the average age of Aman, Boman and Chaman?Read the statement given below:The age of Aman, Boman and Chaman are in the ratio 6 : 5 : 3 respectively.Which of the below information is additionally required to answer the above question?

• A. The age of Boman is greater than the average age of three people.
• B. The difference in the age of Boman and Chaman is twice the difference in the age of Aman and Boman.
• C. The age of Aman is twice the age of Chaman.
• D. On the first birthday of Chaman, Aman was 9 years older than Boman.