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': 'When is the maximum collagen content of woundtissue - \nSelect and explain. \nA. Between 3rd to 5th day, B. Between 6th to 17th day, C. Between 17th to 21st day, D. None of the above', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Over the first 3 weeks strength and collagen content both increases but after 21 days collagen content remains static and only wound strength increases.', 'role': 'assistant'}]