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
True about V.S.D. is, all except - 
Select and explain. 
A. Small hole closes spontaneously, B. Defect is usually in membranous part, C. Endocarditis is commonest complication, D. Pulmonary oligemia in chest X-ray
D: Pulmonary oligemia in chest X-ray
Answer: D: Pulmonary oligemia in chest X-ray 
Explanation: In chest radiography, the Westermark sign is a sign that represents a focus of oligemia (hypovolemia) (leading to collapse of vessel) seen distal to a pulmonary embolism (PE). ... Essentially, this is a plain X-ray version of a filling defect as seen on computed tomographypulmonary arteriogram.