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': 'The following are the psychiatric sequelae after stroke in elderly :a) Depressionb) Post traumatic stress disorder c) Dementiad) Hysteria \nSelect and explain. \nA. a, B. bc, C. ac, D. b', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Four common psychiatric disorder in old age (> 60 years) are : \xa0Dementia (3 - 10%), Depression (1 - 3%), Alcoholism (0.5 - 2.5%) and Paranoia (0.5 - 2.5%).', 'role': 'assistant'}]