This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Renal physiology, Subject name: Physiology
Juxtamedullary nephrons constitute what percentage of nephrons 
Select and explain. 
A. 10, B. 15, C. 30, D. 70
C: 30
Answer: C: 30 
Explanation: Juxtamedullary nephrons constitute only 30 percent of total nephrons .....remaining being coical nephrons. Ref: guyton and hall textbook of medical physiology 12 edition page number:460,461,462