question_answer

The ratio of the ages of two boys is 3:4. After 3 years, the ratio will be 4: 5. The ratio of their ages after 21 years will be

A)  \[14:17\]                      

B)  \[17:19\]

C)  \[11:12\]                      

D)  \[10:11\]

E)  None of these