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
Collagen synthesis requires which of the following vitamin? 
Select and explain. 
A. Vitamin A, B. Vitamin D, C. Vitamin E, D. Vitamin C
D: Vitamin C
Answer: D: Vitamin C 
Explanation: 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