This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Labour - II, Subject name: Gynaecology & Obstetrics
Mean half life of oxytocin? 
Select and explain. 
A. 3 min, B. 30 min, C. 2 min, D. 1 min
A: 3 min
Answer: A: 3 min 
Explanation: Oxytocin has a half life of approximately 3-5 minutes.