In the Bode plot of a unity feedback control system, the value of phase of (G(j omega))

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In the Bode plot of a unity feedback control system, the value of phase of \(G(j \omega)\) at the gain cross over frequency is \(-125^{\circ}\). The phase margin of the system is
(a) \(-125^{\circ}\)
(b) \(-55^{\circ}\)
(c) \(55^{\circ}\)
(d) \(125^{\circ}\)

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