This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Metabolism of protein and amino acid, Subject name: Biochemistry
Dopamine beta-hydroxylase catalyzes 
Select and explain. 
A. Dopa to dopamine, B. Norepinephrine to dopamine, C. Epinephrine to norepinephrine, D. Dopamine to norepinephrine
D: Dopamine to norepinephrine
Answer: D: Dopamine to norepinephrine 
Explanation: Dopamine is hydrolysed by Dopamine beta hydroxylase to Norepinephrine or Adrenaline.Ref: DM Vasudevan - Textbook of Biochemistry, 7th edition, page no: 235