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The condition on $\mathrm{R}, \mathrm{L}$ and $\mathrm{C}$ such that the step response $y(t)$ in the figure has no oscillations, is

- $\mathrm{R} \geq \frac{1}{2} \sqrt{\frac{\mathrm{L}}{\mathrm{C}}}$
- $\mathrm{R} \geq \sqrt{\frac{\mathrm{L}}{\mathrm{C}}}$
- $\mathrm{R} \geq 2 \sqrt{\frac{\mathrm{L}}{\mathrm{C}}}$
- $ \mathrm{R}=\frac{1}{\sqrt{\mathrm{LC}}}$