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': 'In lung X–ray, heterogenous shadow is due to – a) Haemangiomab) Pulmonary infarctionc) Metastatic lesiond) TB \nSelect and explain. \nA. ab, B. bc, C. bd, D. cd', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Heterogeneous shadow is produced by metastasis, bronchopneumonia, Miliary TB.', 'role': 'assistant'}]