The transfer function of a compensator is given as $$G_c(s) = \frac{s+a}{s+b}$$

The phase of the above lead compensator is maximum at

1. $\sqrt{2}$ rad/s
2. $\sqrt{3}$ rad/s
3. $\sqrt{6}$ rad/s
4. $1 / \sqrt{3}$ rad/s
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