Three equal charges are placed on the three corners of a square. If the force between \[{{q}_{1}}\] and \[{{q}_{2}}\]is \[{{F}_{12}}\] and that between \[{{q}_{1}}\]and \[{{q}_{3}}\] is \[{{F}_{13}}\], the ratio of magnitudes \[\frac{{{F}_{12}}}{{{F}_{13}}}\] is [MP PET 1993]

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