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
In lung X–ray, heterogenous shadow is due to – a) Haemangiomab) Pulmonary infarctionc) Metastatic lesiond) TB 
Select and explain. 
A. ab, B. bc, C. bd, D. cd
D: cd
Answer: D: cd 
Explanation: Heterogeneous shadow is produced by metastasis, bronchopneumonia, Miliary TB.