This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Metabolism of nucleic acids, Subject name: Biochemistry
In urea cycle, hydrolysis of arginine forms 
Select and explain. 
A. Citrulline, B. Ornithine, C. Carbomoyl phosphated, D. Arginosuccinase
B: Ornithine
Answer: B: Ornithine 
Explanation: Hydrolysis of arginine by enzyme arginase produce ornithine and urea Ref-Sathyanarayana 4/e p393