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: Surgery
[{'content': 'The commonest symptom post operatively seen is ? \nSelect and explain. \nA. Depression, B. Psychosis, C. Euphoria, D. None of the above', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., None of the above Delirium is the commonest psychiatric problem postoperatively (1) Delirium - 20 % (2) Depression- 9% (3) Dementia- 3% (4) Functional Psychosis- 2%", 'role': 'assistant'}]