Five point charges each having magnitude q are placed at the corner of hexagon as shown in figure. Net electric field at the centre O is $\overrightarrow{\mathrm{E}}$ . To get net electric field at O be 6$\overrightarrow{\mathrm{E}}$ ,
charge placed on the remaining sixth comer should be

• A

  6q

• B

  -6q

• C

  5q

• D

  -5q