This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous Questions, Subject name: Medicine
The most common type of lung carcinoma in non- smokers 
Select and explain. 
A. Squamous cell carcinoma, B. Adenocarcinoma, C. Small cell carcinoma, D. Large cell carcinoma
B: Adenocarcinoma
Answer: B: Adenocarcinoma 
Explanation: Adenocarcinomas often occur in more peripheral lung locations Most common type of lung cancer occurring in non smokers.