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
Normal creatinine level is: 
Select and explain. 
A. 0.8 - 1.2 mg/dL, B. 1.0 - 2.0 mg/dL, C. 2.2 - 3.0 mg/dL, D. 3.0 - 3.8 mg/dL
A: 0.8 - 1.2 mg/dL
Answer: A: 0.8 - 1.2 mg/dL 
Explanation: 0.8 - 1.2 mg/dL