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
What is amethocaine: 
Select and explain. 
A. 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
D: All are true
Answer: D: All are true 
Explanation: 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.