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
The incidence of which of the following cancers has increased in the past 4 decades - 
Select and explain. 
A. Carcinoma of pancreas, B. Carcinoma of stomach, C. Carcinoma of lung, D. Carcinoma of colon
C: Carcinoma of lung
Answer: C: Carcinoma of lung 
Explanation: None