Four capacitors are connected inseries a battery of emf `10 V` as shown in the figure. The point `P` is earthed. The potential of point `A` is equal in magnitude to potetial of points `B` but opposite in sign is

Options

A. `C_1+C_2+C_3=C_4`
B. `1/C_1+1/C_2+1/C_3=1/C_4`
C. `(C_1C_2C_3)/(C_1^2+C_2^2+C_3^2)=C_4`
D. its is never possible

Answer

B

Explanation

Net capacitance between points `A` and `P` will be equal to the net capacitance between points `P` and `B`.