Two identical charged spheres of material density p, suspended from the same point by inextensible strings of equal length make an angle `theta` between the strings, when suspended in a liquid of density `sigma` the angle `theta` remains the same. The dielectric constant K of the liquid is

Options

A. `p/(p-sigma)`
B. `(p-sigma)/p`
C. `(sigma+p)/(sigma-p)`
D. `(p+sigma)/p`

Answer

B