Four identical particles each of mass m and charge q are kept at the four comers of a square of length L. The final velocity of these particles after setting them free will be

• A. \[{{\left[ \frac{K{{q}^{2}}}{mL}\left( 5.4 \right) \right]}^{1/2}}\]
• B. \[{{\left[ \frac{K{{q}^{2}}}{mL}\left( 1.35 \right) \right]}^{1/2}}\]
• C. \[{{\left[ \frac{K{{q}^{2}}}{mL}\left( 2.7 \right) \right]}^{1/2}}\]
• D. None of these