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
Cephalization of pulmonary blood vessels is seen in all except 
Select and explain. 
A. Aortic stenosis, B. Mitral stenosis, C. Severe mitral regurgitation, D. Severe aortic  regurgitation
D: Severe aortic  regurgitation
Answer: D: Severe aortic  regurgitation 
Explanation: Cephalization of pulmonary vessels  seen on radiography is the earliest sign of pulmonary venous hypertension.  Usually occurs in left sided obstructive lesions,  L.V failure.