\eqalign{ & {\text{If }}\frac{m}{n}{\text{ = }}\frac{4}{3} \cr & {\text{and }}\frac{r}{t}{\text{ = }}\frac{9}{{14}}{\text{,}}\,{\text{then}} \cr & {\text{The value of}} \cr & \frac{{3mr - nt}}{{4nt - 7mr}}{\text{ is = ?}} \cr} $$

• A. -51/2
• B. -11/14
• C. -11/4
• D. 11/14