This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiratory system, Subject name: Anatomy
[{'content': 'Commonest type of lung carcinoma in non-smokers is \nSelect and explain. \nA. Squamous cell carcinoma, B. Small cell carcinoma, C. Adenocarcinoma, D. Alveolar cell carcinoma', 'role': 'user'}, {'content': 'Answer: C \nExplanation: The most common lung carcinoma arising in life time non smokers is adenocarcinoma Commonest lung carcinoma in wolrd Common in females Ref Harrison 19th edition pg 515', 'role': 'assistant'}]