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: Pathology
[{'content': 'Scar carcinoma of lung is seen most commonly following -a)  Tuberculosisb)  Irradiationc)  Infarctd)  Lung abscess \nSelect and explain. \nA. abc, B. bc, C. acd, D. bcd', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Scar Ca seen after → Old infarcts, metallic foreign bodies, wounds, granulomatous infection such as T.B. These carcinomas are usually Adenocarcinomas', 'role': 'assistant'}]