The maximum electric field intensity on the axis of a uniformly charged ring of charge q and radius R will be:
(1) $\frac{1}{4{\mathrm{\pi \epsilon }}_0} \frac{\mathrm{q}}{3\sqrt{3}{\mathrm{R}}^2}$           (2) $\frac{1}{4{\mathrm{\pi \epsilon }}_0} \frac{2\mathrm{q}}{3{\mathrm{R}}^2}$               (3) $\frac{1}{4{\mathrm{\pi \epsilon }}_0} \frac{2\mathrm{q}}{3\sqrt{3}{\mathrm{R}}^2}$              (4) $\frac{1}{4{\mathrm{\pi \epsilon }}_0} \frac{3\mathrm{q}}{2\sqrt{3}{\mathrm{R}}^2}$