The angles of asymptotes of the root loci of the equation s^3+5s^2+(K+2)s+K=0 are:
(a) 0° and 270°
(b) 0° and 180°
(c) 90° and 270°
(d) 90° and 180°
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Question is taken from Construction of Root Loci in portion The Root Locus Technique of Control Systems