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
Which of the following structure is seen in the centre of cavernous sinus? 
Select and explain. 
A. 1st part of V nerve, B. ICA, C. 4th nerve, D. 2nd part of V nerve
B: ICA
Answer: B: ICA 
Explanation: None