Which of the following statements concerning the Bode plot are correct?
1. The relative stability can be obtained using Bode plots.
2. For a system with time delay, the phase plot does not reach a minimum value.
3. For a minimal system phase system, the phase plot reaches a minimum value.
4. Gain and phase margin can be used to ascertain the stability of a system using Bode plot.

A. 1, 2, 3 and 4 are correct

B. Only 3 and 4 are correct

C. Only 1, 2 and 4 are correct

D. Only 2, 3 and 4 are correct

Answer: Option A