The foot of the perpendicular from the point (1, 6, 3) to the line x1=y−12=z−23 is

[a] Equation of line is x1=y−12=z−23 Any point on this line is (K,2K+1,3K+2.) if this is the foot of perpendicular form (1, 6, 3) then d. r of this perpendicular are