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
Which of the following aery is likely to be involved in 3rd cranial nerve lesion? 
Select and explain. 
A. Anterior communicating, B. Posterior communicating, C. Posterior cerebral, D. Anterior cerebral
B: Posterior communicating
Answer: B: Posterior communicating 
Explanation: 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.