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
In which fetal presentation vaginal delivery can be expected: 
Select and explain. 
A. Face presentation when the chin lies direct to the sacrum, B. Brow presentation, C. Shoulder presentation, D. Face presentation when the chin lies under the symphysis pubis
D: Face presentation when the chin lies under the symphysis pubis
Answer: D: Face presentation when the chin lies under the symphysis pubis 
Explanation: Vaginal delivery is not possible in:

Brow presentation
Shoulder presentation (transverse lie)
Mentoposterior presentation of face (i.e. when chin lies directed to sacrum)

In mentoanterior, i.e when chin lies under the symphysis pubis – vaginal delivery is possible.