Consider the following statements with respect to Routh-Hurwitz criterion:1. It can be used to determine relative stability2. It is valid only for real coefficients of the characteristic equation.3. It is applicable only for non-linear systems.4. It does not provide the exact location of closed-loop poles in left or right-half of s-planeWhich of the above statements are correct?

• A. 1, 2 and 3 only
• B. 3 and 4 only
• C. 1, 2 and 4 only
• D. 1, 2, 3 and 4