The nuclear charge (`Ze`) is non uniformlly distribute with in a nucleus of radius `r`. The charge density `rho(r)` (charge per unit volume) is dependent only on the radial distance r form the centre of the nucleus s shown in figure. The electric field is only along the radial direction.
For a=0 the value of d (maximum value of `rho` as shown in the figure) is
A. `(3Ze^(2))/(4pi R^(3))`
B. `(3Ze)/(pi R^(3))`
C. `(4 Ze)/(3pi R^(3))`
D. `(Ze)/(3pi R^(3))`
