The value of $\mathrm{C}$ required for sinusoidal oscillations of frequency $1 \; \mathrm{kHz}$ in the circuit of given figure is
- $\frac{1}{2 \pi} \; \mu \text{F}$
- $2 \pi \; \mu \text{F}$
- $\frac{1}{2 \pi \sqrt{6}} \; \mu \text{F}$
- $2 \pi \sqrt{6} \; \mu \text{F}$