Let P(6, 3) be a point on the hyperbola $$\frac{x^2}{a^2} - \frac{y^2}{b^2} = 1$$. If the normal at the point P intersects the x-axis at (9, 0), then the eccentricity of the hyperbola is

A

$$\sqrt{\frac{5}{2}}$$

B

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

C

$$\sqrt{2}$$

D

$$\sqrt{3}$$