The sum of the least and greatest fractions among $$\frac{2}{3} , \frac{5}{8}, \frac{7}{11} , \frac{9}{13}$$ is

A

$$\frac{137}{104}$$

B

$$\frac{31}{24}$$

C

$$\frac{111}{88}$$

D

$$\frac{190}{143}$$