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: Forensic Medicine
[{'content': "Urine appears 'Liquid Gold' in which poisoning- \nSelect and explain. \nA. Heavy metals, B. Barbiturates, C. Organophosphorus, D. Lead poisoning", 'role': 'user'}, {'content': "Answer: B \nExplanation: Barbiturate poisoning presents with features of shock i.e. hemo-concentration and oliguria, therefore the urine is highly concentrated and deep yellow I think this could very well mean 'Liquid gold'.", 'role': 'assistant'}]