Engaging diameter of well flexed head in vertex presentation is -: (A) Suboccipito - bregmatic, (B) Suboccipito - frontal, (C) Occipito - frontal, (D) Mento - vertical
Answer is A. Ans. is 'a' i.e., Suboccipito - bregmatic DiametersMeasurement in cmAttitude of the headPresentationSuboccipito - bregmatic9[?]5 cmComplete flexionVertexSuboccipito - frontal10 cmIncomplete flexionVertexOccipito - frontal11[?]5 cmMarked deflexionVertexMento - vertical14 cmPartial extensionBrowSubmento - vertical11[?]5 cmIncomplete extensionFaceSubmento - bregmatic9[?]5 cmComplete extensionFace