In the Nyquist plot of the open-loop transfer function
$$G(s)H(s) = \frac{3s+5}{s-1}$$
corresponding to the feedback loop shown in the figure, the infinite semi-circular arc of the Nyquist contour in s-plane is mapped into a point at
- $G(s)H(s) = \infty$
- $G(s)H(s) = 0$
- $G(s)H(s) = 3$
- $G(s)H(s) = -5$