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: Psychiatry
[{'content': 'MC cause of delirium ? \nSelect and explain. \nA. Infection, B. Liver failure, C. Belladonna poisoning, D. None of the above', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. A. InfectionInfection is one of the most common causes of delirium.', 'role': 'assistant'}]