This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pharmacology
Which of the following enzymes does NOT contain Zn? (NOT RELATED) 
Select and explain. 
A. Alcohol Dehydrogenase, B. Arginase, C. Alkaline Phosphatase, D. Carbonic Anhydrase
B: Arginase
Answer: B: Arginase 
Explanation: Zinc is required for the activity of > 300 enzymes, covering all six classes of enzymes. alcohol dehydrogenase; superoxide dismutase; transferases like RNA polymerase and aspaate transcarbamoylase; hydrolases like carboxypeptidase A and thermolysin; lyases like carbonic anhydrase and fructose-1,6-bisphosphate aldolase; isomerases like phosphomannose isomerase; and ligases like pyruvate carboxylase and aminoacyl-tRNA synthases