If the first, fifth and ninth decile of frequency distribution $$x_{i} \mid f_{i}$$ are 3,10,16, respectively, then Kelly's coefficient of skewness is:

A

$$-\frac{2}{13}$$

B

$$-\frac{3}{13}$$

C

$$-\frac{4}{13}$$

D

$$-\frac{1}{13}$$