This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Angiography, Subject name: Radiology
Four vessel carotid angiography done by injecting dye into- 
Select and explain. 
A. Radial aery, B. Brachial aery, C. Cubital vein, D. Femoral aery
D: Femoral aery
Answer: D: Femoral aery 
Explanation: Four vessel carotid angiography is usually done by injecting dye into: Femoral aery