This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Gynaecology & Obstetrics
Which of the following is the longest foetal diameter? 
Select and explain. 
A. Suboccipitobregmatic, B. Occipitofrontal, C. Mentoveical, D. Submento bregmatic
C: Mentoveical
Answer: C: Mentoveical 
Explanation: Mentoveical (point of the chin to 1 inch in front of posterior fontanelle in the sagital suture) is the longest fetal diameter (13.8 cm). Some of the impoant figures are given below: Suboccipitobregmatic - 9.4cm Occipitofrontal - 11.3cm Mentoveical - 13.8cm Submento bregmatic - 9.4cm Ref: Comp Text book of Obstetrics and Gynecology, Sadhana Gupta, 2011, Page 118