This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anesthesia, Subject name: Pharmacology
[{'content': 'The following statements about Bupivacaine are true except \nSelect and explain. \nA. Must never be injected into a vein, B. More cardiotoxic than lignocaine, C. 0.5 percent is effective for sensory block, D. It produces methaemoglobinemia', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Prilocaine is the local anesthetic that produces methemoglobinemia as an adverse effect. All other statements are true. Ref: K D Tripathi; 7th edition; Page no 367', 'role': 'assistant'}]