This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cranial Nerve Disorders, Subject name: Medicine
Artery 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: Ans. (b) Posterior communicatingRef: Harrison 18/e, chapter 275, Principles and practice of emergency neurology Sid M shah and Kevin M Kelly Textbook of ophthalmology vol. 1 by sunitaagarwal