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
[{'content': 'Optic foramen is located between \nSelect and explain. \nA. Between greater & lesser wing of sphenoid, B. Between two roots of lesser wing of sphenoid, C. Between two roots of greater wing of sphenoid, D. Between ethmoidal and frontal bones', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Optic foramen is the opening to the optic canal present between two roots of lesser wing of sphenoid.', 'role': 'assistant'}]