The value of $$\frac{3\frac{1}{4}-\frac{4}{5}of\frac{5}{6}}{4\frac{1}{3}\div\frac{1}{5}-(\frac{3}{10}+21\frac{1}{5})}-(2\frac{2}{3}of1\frac{1}{2})$$

A

$$13\frac{1}{2}$$

B

$$11\frac{1}{2}$$

C

$$9\frac{1}{2}$$

D

$$12\frac{1}{2}$$