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
All of the following are required for hydroxylation of proline in collagen synthesis except : 
Select and explain. 
A. 2, B. Vitamin C, C. Dioxygenases, D. Pyridoxal phosphate
D: Pyridoxal phosphate
Answer: D: Pyridoxal phosphate 
Explanation: D i.e. Pyridoxal phosphate