Following instruction :

Consider the lines $$m = \frac{x + 1}{3} = \frac{y + 2}{1} = \frac{z + 1}{2}$$ and $$n : \frac{x - 2}{1} = \frac{y + 2}{2} = \frac{z - 3}{3}$$

The shortest distance between m and n is

A

$$\frac{15}{5\sqrt{3}}$$

B

$$\frac{17}{7\sqrt{3}}$$

C

$$\frac{15}{7\sqrt{3}}$$

D

$$\frac{5}{5\sqrt{3}}$$