The entries in the first column of Routh array of a fourth order are 5, 2, - 0.1, 2, 1. The number of poles in the right half plane are

The entries in the first column of Routh array of a fourth order are 5

1.	The entries in the first column of Routh array of a fourth order are 5, 2, - 0.1, 2, 1. The number of poles in the right half plane are
A.	1
B.	2
C.	3
D.	4
Answer» C. 3