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: Physiology
Enzymes, which play an important role in calcification, are: 
Select and explain. 
A. Enolase and Calcitonin, B. Alkaline phosphatase and catalase, C. Alkaline phosphatase and pyrophosphatase, D. Pyrophosphatase and carbonic anhydrase
C: Alkaline phosphatase and pyrophosphatase
Answer: C: Alkaline phosphatase and pyrophosphatase 
Explanation: None