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: Pharmacology
Which of the following is not nephrotoxic ? 
Select and explain. 
A. Tobramycin, B. Kanamycin, C. Ampicillin, D. Amphotericin B
C: Ampicillin
Answer: C: Ampicillin 
Explanation: None