What is the volume(in cm$$^3$$a) ofa spherical shell whose inner and outerradii are respectively 2 cm and 3 cm ?

A

$$\frac{86 \pi}{3}$$

B

$$\frac{56 \pi}{3}$$

C

$$\frac{106 \pi}{3}$$

D

$$\frac{76 \pi}{3}$$