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