Let the distance of the point  $$(a, 2, 5)$$ from the image of the point $$(1, 2, 7)$$ in the line $$\frac{x}{1} = \frac{y-1}{1} = \frac{z-2}{2}$$ is 4,then the sum of all possible values of $$a$$ is equal to:

A

$$11$$

B

$$9$$

C

$$6$$

D

$$4$$