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: Medicine
[{'content': 'An 8-year-old boy, Raju, is brought to the casualty with a history of consuming something while playing outside in the playground. In the examination, there was altered sensorium, hyperpyrexia, dilated pupils.Most probable cause is - \nSelect and explain. \nA. Dhatura poisoning, B. Organophosphorus poisoning, C. Partheniun poisoning, D. Barbiturate poisonig', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]