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: Medicine
[{'content': 'True about adenocarcinoma lung \nSelect and explain. \nA. More common in female, B. Smoking is not associated with, C. Central cavitations, D. Upper lobe involvement is most common', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Adenocarcinoma,also called peripheral carcinoma due to its location and scar carcinoma due to its association with areas of chronic scarring,is the most common bronchogenic carcinoma in females.It occurs more commonly in peripheral lung tissue & is closely linked to smoking.</p Ref:Pathology-Harsh Mohan-6th edition,page no:500.', 'role': 'assistant'}]