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': 'Gastric wash contraindicated in: \nSelect and explain. \nA. Oxalic acid, B. Sulphuric acid, C. Opiate, D. Dhatura', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Sulphuric acid', 'role': 'assistant'}]