The ratio of age of two boys is 5 : 6. After two years the ratio will be 7 : 8. The ratio of their age after 12 years will be = ?

• A. $\frac{{22}}{{24}}$$
• B. $\frac{{15}}{{16}}$$
• C. $\frac{{17}}{{18}}$$
• D. $\frac{{11}}{{12}}$$