104. Consider the following statements: 1. Nyquist criterion is in frequency domain. 2. Bode plot is in frequency domain. 3. Root-locus plot is in time domain. 4. Routh Hermitz’s criterion is in time domain. Which of the following is correct? (a) 1, 2 and 3 are correct. (b) 2, 3 and 4 are correct. (c) 1 and 2 are correct. (d) All four are correct
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