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
Vitamin C is the co-enzyme for the following hydroxylases EXCEPT 
Select and explain. 
A. Peptidyl glycine hydroxylase, B. Dopamine betahydroxylase, C. Prolyl/ lysyl hydroxylase, D. Aspartate betahydroxylase
D: Aspartate betahydroxylase
Answer: D: Aspartate betahydroxylase 
Explanation: -Vitamin C plays the role of a coenzyme in hydroxylation of proline and lysine while protocollagen is converted to collagen  (i.e.  post-translational modification). The hydroxylation reaction is catalysed by lysyl hydroxylase  (for  lysine)  and prolyl  hydroxylase (for  proline).
-Hydroxylation of  glycine  is  carried  out  by peptidylglycine  hydroxylase which  requires vitamin C.
-Ascorbic acid  is required  for  the  oxidation  of  p-hydroxy phenylpyruvate (enzyme hydroxylase) to homogentisic acid in tyrosine metabolism.