In the rectangular co-ordinate system above, if the equation of \[{{l}_{1}}\] is y = x and parallel to \[{{l}_{2}}\], the shortest distance between \[{{l}_{1}}\] and \[{{l}_{2}}\]is

• A. \[\sqrt{2}\]
• B. 1
• C. \[\frac{\sqrt{2}}{2}\]
• D. \[\frac{1}{2}\]