The value of $$\sin^2 30^\circ .\cos^2 45^\circ + 2\tan^2 30^\circ - \sec^2 60^\circ $$ is equal to:

A

$$-\frac{13}{12}$$

B

$$-\frac{77}{24}$$

C

$$-\frac{25}{12}$$

D

$$-\frac{1}{12}$$