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': 'Deficiency of which of the following element will impair wound healing: \nSelect and explain. \nA. Zn, B. Cu, C. Fe, D. Na', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Zn is a co-factor in collagenase.', 'role': 'assistant'}]