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
[{'content': 'Cranial nerve most commonly involved in posterior communicating aery aneurysm is: September 2012 \nSelect and explain. \nA. Oculomotor, B. Facial, C. Optic, D. Trigeminal', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. A i.e. Oculomotor', 'role': 'assistant'}]