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': 'Smell of bitter almonds is seen in poisoning with : \nSelect and explain. \nA. Phosphorus, B. Hydrocyanic acid, C. Nitric acid, D. Oxalic acid', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e. Hydrocyanic acid', 'role': 'assistant'}]