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: Biochemistry
[{'content': 'Which vitamin deficiency leads to collagen breakdown \nSelect and explain. \nA. Vitamin C, B. Vitamin A, C. Vitamin E`, D. Vitamin B1', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]