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
All of the foramens are found in sphenoid bone except: 
Select and explain. 
A. Foramen rotundum, B. Foramen lacerum, C. Optic canal, D. Foramen ovale
B: Foramen lacerum
Answer: B: Foramen lacerum 
Explanation: None