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
Which of the following vitamins is required in proper synthesis of collagen? 
Select and explain. 
A. Vitamin A, B. Vitamin B, C. Vitamin C, D. None of the above
C: Vitamin C
Answer: C: Vitamin C 
Explanation: Vitamin C is required for the hydroxylation of procollagen, a requirement that explains the inadequate wound healing in scurvy Ref: Robbins 8th edition Chapter 3.