This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Regional anaesthesia, Subject name: Anaesthesia
Which of the following anesthetize mucosa is snot Primarily used anesthetize mucosa 
Select and explain. 
A. Benzocaine, B. Lidocaine, C. Bupivacaine, D. Tetracaine
C: Bupivacaine
Answer: C: Bupivacaine 
Explanation: Bupivacaine cannot be used as surface anesthetic agent Bupivacaine is contraindicated in intravenous regional anesthesia due to fear of cardiac arrhythmia