A solid sphere of radius `R_(1)` and volume charge density `rho = (rho_(0))/(r )` is enclosed by a hollow sphere of radius `R_(2)` with negative surface charge density `sigma`, such that the total charge in the system is zero . `rho_(0)` is positive constant and `r` is the distance from the centre of the sphere . The ratio `R_(2)//R_(1)` is

Options

A. `sigma/rho_0`
B. `sqrt((2sigma)/(rho_0))`
C. `sqrt((rho_0)/(2sigma))`
D. `rho_0/sigma`

Answer

C