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In the circuit shown below, capacitors $C_1$ and $C_2$ are very large and are shorts at the input frequency. $\mathrm{v}_{\mathrm{i}}$ is a small signal input. The gain magnitude $\left|\mathrm{v}_{\mathrm{o}} / \mathrm{v}_{\mathrm{i}}\right|$ at $10 \; \mathrm{Mrad} / \mathrm{s}$ is

1. maximum
2. minimum
3. unity
4. zero