Let there be a spherically symmetric charge distribution with charge density varying as $\rho (r) = \rho _0 \left( \frac{5}{4} - \frac{r}{R} \right)$ for $r \le R$,and $\rho (r) = 0$ for $r > R$,where $r$ is the distance from the origin. The electric field at a distance $r (r < R)$ from the origin is given by:

• A
  $\frac{\rho _0 r}{3 \varepsilon _0} \left( \frac{5}{4} - \frac{r}{R} \right)$
• B
  $\frac{4 \pi \rho _0 r}{3 \varepsilon _0} \left( \frac{5}{3} - \frac{r}{R} \right)$
• C
  $\frac{\rho _0 r}{4 \varepsilon _0} \left( \frac{5}{3} - \frac{r}{R} \right)$
• D
  $\frac{4 \pi \rho _0 r}{3 \varepsilon _0} \left( \frac{5}{4} - \frac{r}{R} \right)$