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: Anatomy
[{'content': 'All of the foramens are found in sphenoid bone except: \nSelect and explain. \nA. Foramen rotundum, B. Foramen lacerum, C. Optic canal, D. Foramen ovale', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]