Seven years ago, the average age of A, B and C was 51 years. If A is 3 years older than B and B is 3 years older then C then the present ages of A, B and C are ( in year)

• A. 61, 58 and 55
• B. 54, 51, and 48
• C. 55, 58, and 61
• D. 48, 51 and 54