The value of $$51 \div \left\{25 + \left(25 \ of \ 12 \div 30\right) - \left(5^{4} \div 5 \ of \ 125\right)\right\}$$

A

$$\frac{2}{3}$$

B

$$\frac{3}{2}$$

C

$$-\frac{2}{3}$$

D

$$-\frac{3}{2}$$