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': 'Which of the following aery is likely to be involved in 3rd cranial nerve lesion? \nSelect and explain. \nA. Anterior communicating, B. Posterior communicating, C. Posterior cerebral, D. Anterior cerebral', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Answer is B (Posterior Communicating Aery): The occulomotor nerve (CNIII) courses in close relationship to the posterior communicating aery and is frequently compressed by an enlarging aneurysm of the posterior communicating aery.', 'role': 'assistant'}]