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': 'Characteristic postmortem finding of carbolic acid poisoning is \nSelect and explain. \nA. Grunish stomach, B. Yellow charred stomach, C. Brown leathery stomoch, D. Black charred stomach', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Stomach mucosa :\n\nSulphuric acid : Charred / Black\xa0 / blottin paper stomach\nCopper sulphate : Bluish green\nFerrous sulphate : Green\nArsenic : pink velvety mucosa / strawberry\nNitric acid : yellow\nCarbolic acid : White leathery stomach.', 'role': 'assistant'}]