This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pharmacology
[{'content': 'A man of 50 years presents following the death of his wife, which one is an abnormal grief reaction NOT RELATED-PSYCHIATRY \nSelect and explain. \nA. A brief episode of seeing the dead person, B. Poor concentration, C. Poor memory, D. Delayed or absent grief', 'role': 'user'}, {'content': 'Answer: D \nExplanation: .', 'role': 'assistant'}]