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: Physiology
Standard urea clearance in an normal adult is? 
Select and explain. 
A. 20 ml, B. 50 ml, C. 100 ml, D. 200 ml
B: 50 ml
Answer: B: 50 ml 
Explanation: Ans. is'b'i.e., 50 mlStandard clearance of urea (Cs) and average normal value is 54