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
Oligohydramnios is seen in all except: 
Select and explain. 
A. Renal agenesis, B. Rh incompatibility, C. IUGR, D. Postrnaturity
B: Rh incompatibility
Answer: B: Rh incompatibility 
Explanation: Rh incompatibility