In root locus plot, a point on the real axis lies on the locus, if the number of open loop poles plus zeros on real axis to the
a) left of the point is odd b) left of the point is even .
c) right of the pointis odd d) right of the point is even
a) left of the point is odd b) left of the point is even .
c) right of the pointis odd d) right of the point is even