What is a, b & c respectively? A a = Crest b = Trough c = Limb. B a = Plunge b = Crest c = Limb. C a = Limb b = Crest c = Plunge D a = Trough b = Crest c = Limb. The correct Answer Is D D a = Trough b = Crest c = Limb.
