If $$16^{2} - k = \left(4y+\frac{3}{2}\right) \left(4y-\frac{3}{2}\right)$$, then the value of k is:

A

$$\frac{9}{4}$$

B

$$\frac{11}{4}$$

C

$$\frac{6}{4}$$

D

$$\frac{7}{4}$$