In the formation of Routh-Hurwitz array for a polynomial, all the elements of a row have zero values. This premature termination of the array indicates the presence of1. a pair of real roots with opposite sign2. complex conjugate roots on the imaginary axis3. a pair of complex conjugate roots with opposite real partsWhich of the above statements are correct?

In the formation of Routh-Hurwitz array for a polynomial, all the elem

1.	In the formation of Routh-Hurwitz array for a polynomial, all the elements of a row have zero values. This premature termination of the array indicates the presence of1. a pair of real roots with opposite sign2. complex conjugate roots on the imaginary axis3. a pair of complex conjugate roots with opposite real partsWhich of the above statements are correct?
A.	Only 2
B.	2 and 3
C.	Only 3
D.	1, 2 and 3
Answer» E.