This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Anaesthesia
Most cardiotoxic local anesthetic 
Select and explain. 
A. Procaine, B. Bupivacaine, C. Cocaine, D. Lidocaine
B: Bupivacaine
Answer: B: Bupivacaine 
Explanation: Bupivacaine is the most cardiotoxic LA (Ropivacaine is a newer bupivacaine congenial with less cardiotoxicity).(Refer: stoelting's pharmacology and physiology in anaesthetic practice, 5th edition, pg no.294)