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
Which of the following local anaesthetic agent is a vasoconstrictor 
Select and explain. 
A. Lignocaine, B. Cocaine, C. Bupivacaine, D. Tetracaine
B: Cocaine
Answer: B: Cocaine 
Explanation: Cocaine is sympathomimetic agent.