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. O2, B. Vitamin C, C. Dioxygenases, D. Pyridoxal phosphate
D: Pyridoxal phosphate
Answer: D: Pyridoxal phosphate 
Explanation: Hydroxylation of proline and lysine during collagen synthesis requires vitamin C (ascorbic acid), molecular oxygen (O2), α-ketoglutarate and enzymes dioxygenases (prolyl hydroxylase, lysyl hydroxylase).