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
The bladder should be empty within : 
Select and explain. 
A. 2-3 hrs of delivery, B. 3-4 hrs of delivery, C. 4-5 hrs of delivery, D. 6-8 hrs of delivery
B: 3-4 hrs of delivery
Answer: B: 3-4 hrs of delivery 
Explanation: 3-4 hrs of delivery