The shoest diameter of fetal head :: (A) Biparietal diameter, (B) Suboccipitofrontal diameter, (C) Occipitofrontal diameter, (D) Bitemporal diameter
Answer is D. Bitemporal and biparietal diameters are transverse diameters whereas suboccipitofrontal and occipitofrontal are the anteroposterior diameters Bitemporal diameter is 8 cm Ref: Datta Obs 9e pg 77.