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: Pharmacology
Which among the following is the most cardiotoxic LA: 
Select and explain. 
A. Dibucaine, B. Bupivacaine, C. Prilocaine, D. Lignocaine
B: Bupivacaine
Answer: B: Bupivacaine 
Explanation: Bupivacaine induced cytotoxicity is enhanced by acidosis, hypercarbia, hypoxemia.