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
[{'content': 'Most common malignancy in lung is ? \nSelect and explain. \nA. Small cell carcinoma, B. Squamous cell carcinoma, C. Adenocarcinoma, D. Lymphoma', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Adenocarcinoma Squamous carcinoma was the most commonly diagnosed form of NSCLC; however, with the steady decline in cigarette consumption over the past four decades and changes in cigarette manufacturing (including use of different types of filters), adenocarcinoma has replaced squamous cell carcinoma as the most frequent histologic subtype.", 'role': 'assistant'}]