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: Surgery
Bile is concentrated in the gall bladder to _________ times 
Select and explain. 
A. 10-May, B. 15-Oct, C. 20-30, D. 40-50
A: 10-May
Answer: A: 10-May 
Explanation: None