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
The aminoglycoside with least toxic effect is: 
Select and explain. 
A. Ethambutol, B. Isoniazid, C. Streptomycin, D. Kanamycin
C: Streptomycin
Answer: C: Streptomycin 
Explanation: None