This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Radiology
Vngiogram of basilar artery bifurcation showing 
Select and explain. 
A. Brain Tumor, B. A-V malformation, C. Aneurysm, D. Atherosclerotic block
C: Aneurysm
Answer: C: Aneurysm 
Explanation: (C) Aneurysm# Two-dimensional angiogram showing the aneurysm arising from the basilar bifurcation (arrow).> Three-dimensional angiogram of the same blood vessels, showing the aneurysm (red arrow) and surrounding blood vessels in greater detail.