Three uncharged capacitors of capacitances $$C_1 = 2\,\mu F$$, $$C_2 = 3\,\mu F$$ and $$C_3 = 5\,\mu F$$ are connected as shown in figure to one another at O and to points A, B and D at potentials $$V_A = 300$$ V, $$V_B = 200$$ V and $$V_D = 400$$ V respectively the potential $$V_O$$ at O is

A

300 V

B

320 V

C

240 V

D

280 V