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
[{'content': 'A 54–year old obese patient with type 2 diabetes mellitus and a history of alcoholism probably should not receive metformin because it can increase the risk of: \nSelect and explain. \nA. Disulfiram like reaction, B. Hypoglycemia, C. Lactic acidosis, D. Severe hepatic toxicity', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]