This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Brain , Subject name: Anatomy
POSTERIOR COMMUNICATING aery is a branch of 
Select and explain. 
A. Veebral aery, B. Internal carotid aery, C. External carotid aery, D. Basillary aery
B: Internal carotid aery
Answer: B: Internal carotid aery 
Explanation: Posterior communicating aery is a branch of cerebral pa of internal carotid aery. It arises close to its termination. It runs backwards and anastomoses with proximal pa of posterior cerebral aery.Reference: Textbook of anatomy, Head neck, and brain, Vishram Singh, 2nd edition, page no.406