Longest diameter of fetal skull is:
Ans. is d, i.e. SubmentoverticalRef. Dutta Obs 9/e p 77-78Remember:Smallest diameterLongest diameterIst = Bimastoid diameterIInd = Bitemporal diameterIst = Mento verticalIInd = Submento vertical/occipitofrontal
Biparietal
Bitemporal
Occipito temporal
Submentovertical
Fetal Skull and Maternal Pelvis