This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Structure and function of protein, Subject name: Biochemistry
In which of the following reactions magnesium is required 
Select and explain. 
A. ATPase, B. Dismutase, C. Phosphatase, D. Aldolase
C: Phosphatase
Answer: C: Phosphatase 
Explanation: Magnesium is required for Carboxylase, phosphatase, transketolase, adenyl cyclase, ribonuclease and kinases Ref : Biochemistry by U. Satyanarayana 3rd edition Pgno : 410