Simplify: $$\left(3y\right)^{2} + x^{2} - \left(2y\right)^{2}$$S

A

$$x^{2} - 5y^{2}$$

B

$$x^{2} + y^{2}$$

C

$$x^{2} - y^{2}$$

D

$$x^{2} + 5y^{2}$$