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
Scar carcinoma of lung is seen most commonly following - 
Select and explain. 
A. Tuberculosis, B. Irradiation, C. Infarct, D. All
D: All
Answer: D: All 
Explanation: Ans. is 'a' i.e., Tuberculosis; 'b' i.e., Irradiation & 'c' i.e., Infarct Scar Ca seen after --> Old infarcts, metallic foreign bodies, wounds, granulomatous infection such as T.B. These carcinomas are usually Adenocarcinomas