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
[{'content': "Hampton's hump is seen in chest X-ray in: \nSelect and explain. \nA. Bronchogenic Ca, B. Aspergillosis, C. Pulmonary TB, D. Pulmonary embolism", 'role': 'user'}, {'content': "Answer: D \nExplanation: pulmonary embolism Hamptons' hump is one of the classic radiographic findings of pulmonary embolism. It appears as a peripheral wedge shaped opacity on chest x rays. It is d/t pulmonary infarct. Other signs of pulmonary embolism on chest x-ray Westermark's sign - it's a.focal area of oligetnia due to vesoconstriction distal to embolus. Palla's sign - enlarged right descending pulmonary aery.", 'role': 'assistant'}]