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 type of carcinoma lung is - \nSelect and explain. \nA. Small cell carcinoma, B. Adenocarcinoma, C. Squamous cell carcinoma, D. Large cell carcinoma', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Adenocarcinoma of the lung is the most frequent histological type.\xa0- Sabiston\nLung Carcinoma\n\nCarcinoma of the lung is the most common neoplasm of lung, i.e. cancer arising from the epithelial cells.\nLung cancer is the most common cause of cancer-related death.\nOccurs most often between ages 40 and 70 years.\nThe major histological types of lung carcinoma are -\n\n\n\nAdenocarcinoma (including bronchoalveolar type) → Most common lung cancer worldwide.\n\n\nSquamous cell carcinoma → Most common lung cancer in India.\n\n\nSmall cell carcinoma (Oat cell carcinoma).\n\n\nLarge cell carcinoma\n\n\nThese tumors can be divided broadly into two groups -\nA.\xa0Small cell carcinoma\nB.\xa0Non-small cell carcinoma → Squamous cell carcinoma, adenocarcinoma, Large cell carcinoma.', 'role': 'assistant'}]