Two non-conducting solid spheres of radii \( \mathrm{R} \) and \( 2 R \), having uniform volume ....

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Two non-conducting solid spheres of radii \( \mathrm{R} \) and \( 2 R \), having uniform volume charge densities \( \rho_{1} \) and \( \rho_{2} \) respectively, touch each other. The net electric field at a distance \( 2 \mathrm{R} \) from the centre of the smaller sphere, along the line joining the centres of the spheres, is zero. The ratio \( \frac{\rho_{1}}{\rho_{2}} \) can be:
(A) -4
(B) \( -\frac{32}{25} \)
(C) \( \frac{32}{25} \)
(D) 4


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