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
Dosage of topical tobramycin eye drops : 
Select and explain. 
A. 1 mg/ml, B. 2 mg/ml, C. 3 mg/ml, D. 4 mg/ml
C: 3 mg/ml
Answer: C: 3 mg/ml 
Explanation: None