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
Contraction stress test is used to detect : 
Select and explain. 
A. Fetal hypoxia, B. Placenta pre, C. Hydramnios, D. Cord prolapse
A: Fetal hypoxia
Answer: A: Fetal hypoxia 
Explanation: Fetal hypoxia