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
Action of lignocaine is affected by all except 
Select and explain. 
A. PH at the site of injection, B. Blood flow at the site of injection, C. Vasoconstrictor in the L.A solution, D. Action of cholinesterase at the site of injection
D: Action of cholinesterase at the site of injection
Answer: D: Action of cholinesterase at the site of injection 
Explanation: None