A rectangle is formed by the lines x= O, y = O, x=3 and y = 4. Let the line L be perpendicular to 3x +y + 6 = 0 and divide the area of the rectangle into two equal parts. Then the distance of the point $$\left(\frac{1}{2},-5\right)$$ from the line L is equal to :

A

2$$\sqrt{10}$$

B

$$\sqrt{10}$$

C

3$$\sqrt{10}$$

D

2$$\sqrt{5}$$