This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Vitreous and retina, Subject name: Ophthalmology
Drugs causing macular toxicity when given intiavitreally- 
Select and explain. 
A. Gentamycin, B. Vancomycin, C. Dexamethasone, D. Ceftazidime
A: Gentamycin
Answer: A: Gentamycin 
Explanation: Ref:comprehensive ophthalmology AK Khurana 4th edition page no :152 Gentamycin is 4 times more retinotoxic (causes macular infarction) than amikacin. Preferably the aminoglycosides should be avoided. 