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: Radiology
Hilar markings in a normal chest X-ray is formed by all except: 
Select and explain. 
A. Pulmonary aery, B. Bronchi, C. Upper lobe veins, D. Upper lobe veins
D: Upper lobe veins
Answer: D: Upper lobe veins 
Explanation: Ans. Upper lobe veins