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: Ophthalmology
Normal aqueous production rate is about: 
Select and explain. 
A. 21/min, B. 2.3 pl/min, C. 2.6 pl/min, D. 2.9 pl/min
B: 2.3 pl/min
Answer: B: 2.3 pl/min 
Explanation: Ans. 2.3 pl/min