This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: vitamins, Subject name: Biochemistry
[{'content': 'Collagen synthesis requires which of the following vitamin? \nSelect and explain. \nA. Vitamin A, B. Vitamin D, C. Vitamin E, D. Vitamin C', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Vitamin Functions Deficiency Disease C Coenzyme in hydroxylation of proline and lysine in collagen synthesis Antioxidant Enhances absorption of iron Scurvy--impaired wound healing, loss of dental cement, subcutaneous hemorrhage Reference: Harper; 30th edition; Page no: 550', 'role': 'assistant'}]