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: Anaesthesia
Naturally occurring LA – 
Select and explain. 
A. Cocaine, B. Lidocaine, C. Bupivacaine, D. Tetracaine
A: Cocaine
Answer: A: Cocaine 
Explanation: Cocaine is the only naturally occuring local anaesthetic, obtained from leaves of Erythroxylon coca.