This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Poisoning, Subject name: Forensic Medicine
[{'content': 'Liquid gold urine is seen with which poisoning \nSelect and explain. \nA. Heavy metals, B. Barbiturates, C. Organophosphorous, D. Lead poisoning', 'role': 'user'}, {'content': 'Answer: B \nExplanation: color of urine in different poisoning carbolic acid-green Nitric acid - brown Barbiturates- liquid gold Ref: Dr Bhatia medical toxicology', 'role': 'assistant'}]