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
Causes of Hydramnios are all except : 
Select and explain. 
A. Anencephaly, B. Oesophageal atresia, C. Posterior urethral value, D. Twins
C: Posterior urethral value
Answer: C: Posterior urethral value 
Explanation: Posterior urethral value