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: Ophthalmology
Homonymus hemianopia may be seen in lesion of all of the following, except: 
Select and explain. 
A. Optic nerve, B. Optic chiasma, C. Optic tract, D. Optic radiation
A: Optic nerve
Answer: A: Optic nerve 
Explanation: Optic nerve