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': 'Which is excreted typically in lead poisoning - \nSelect and explain. \nA. Urobilinogen, B. Coproporphyrin, C. Bilirubin, D. Bile salts', 'role': 'user'}, {'content': 'Answer: B \nExplanation: In lead poisoning coproporphyrin excretion is increased in urine (normally, in nonexposed person it is less than 150 g/liter).', 'role': 'assistant'}]