A circular arc whose radius is 4 cm makes an angle $$45^{\circ}$$ at the centre. Find the perimeter of the sector formed.
[Use $$\pi = \frac{22}{7}$$]

A

$$\frac{78}{7}$$ cm

B

$$\frac{72}{7}$$ cm

C

$$\frac{74}{7}$$ cm

D

$$\frac{76}{7}$$ cm