The diameter of a hemisphere is equal to the diagonal of a rectangle of length 4 cm and breadth 3 cm. Find the total surface area (in $$cm^{2}$$ ) of the hemisphere.

A

$$25\pi$$

B

$$\frac{75\pi}{4}$$

C

$$\frac{50\pi}{4}$$

D

$$\frac{25\pi}{4}$$