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: Medicine
Nerve compressed by aneurysm of posterior communicating artery is - 
Select and explain. 
A. Occulomotor nerve, B. Optic nerve, C. Hypophysis cerebri, D. Trochlear nerve
A: Occulomotor nerve
Answer: A: Occulomotor nerve 
Explanation: None