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: Pathology
[{'content': 'Gray hepatization of lungs is seen on the day - \nSelect and explain. \nA. 1, B. 3-Feb, C. 5-Mar, D. 7-May', 'role': 'user'}, {'content': 'Answer: D \nExplanation: All 4 phases may be seen in different parts of the same lung\n\nCongestion (1-2 days)\nRed hepatization (2nd-4th day)\nGray hepatization (5th-8th day)\nResolution (8th-9th day)', 'role': 'assistant'}]