This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Abnormal labor, Subject name: Gynaecology & Obstetrics
Which or face presentation? 
Select and explain. 
A. Anencephaly, B. Contracted pelvis, C. Placenta prae, D. Thyroid swelling
A: Anencephaly
Answer: A: Anencephaly 
Explanation: Fetal factors anencephaly and iniencephaly Cord around the neck Tumours of neck like congenital goitre Spasm of sternocleidomastoid muscle Dolicocephalic head (refer pgno:370 Sheila textbook of obstetrics 2 nd edition)