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: Pathology
Source of ammonia in urine 
Select and explain. 
A. Glutaminase, B. Urease, C. Glutamate dehydrogenase, D. Arginase
A: Glutaminase
Answer: A: Glutaminase 
Explanation: .