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
Rapid onset of action seen by local anesthesia in small nerve endings is due to 
Select and explain. 
A. Increased threshold of small nerves due to depolarization, B. Low pH of small nerve fibres, C. High ratio of surface area to the volume of small nerve fibres, D. Increased resting potential of small nerve fibres
C: High ratio of surface area to the volume of small nerve fibres
Answer: C: High ratio of surface area to the volume of small nerve fibres 
Explanation: None