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
Local Anaesthetic first used clinically – 
Select and explain. 
A. Procaine, B. Lignocaine, C. Bupivacaine, D. Cocaine
D: Cocaine
Answer: D: Cocaine 
Explanation: Cocaine was the first local anesthetic used by Carl Koller.