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
In adult male person presents with drowsiness, vertigo & unconsciousness which artery is involved- 
Select and explain. 
A. Anterior cerebral artery, B. Middle cerebral artery, C. Posterior cerebral artery, D. Anterior choroidal artery
C: Posterior cerebral artery
Answer: C: Posterior cerebral artery 
Explanation: None