This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Regional Anesthesia, Subject name: Anaesthesia
[{'content': 'What is amethocaine: \nSelect and explain. \nA. It is ester local anesthetic, B. It is other name of tetracaine, C. It is also typically very effective on local application, D. All are true', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Amethocaine is an ester local anaesthetic tetracaine. It is a very effective surface anesthetic. Tetracaine, also known as amethocaine, is a local anesthetic used to numb the eyes, nose, or throat. It may also be used before staing an intravenous to decrease pain from the procedure. Typically it is applied as a liquid to the area.', 'role': 'assistant'}]