<prompt> Longest diameter is -BPDSuboccipitobregmaticMentoverticalSubmentobregmatic  <response>: Ans. is c i.e., Mentovertical Biparietal diameter - 9.5 cm Mentovertical diameter - 13.5 cm Bitemporal diameter - 8 cm Submentovertical diameter - 11.5 cm Bimastoid diameter - 7.5 cm Submentobregmatic diameter - 9.5 cm Suboccipito-Bregmatic diameter - 9.5 cm Occipitofrontal diameter - 11.5 cm Suboccipito-Frontal diameter - 10 cm 