This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardio thoracic surgery  , Subject name: Surgery
[{'content': 'The most common histological type seen in branchogenic carcinoma is \nSelect and explain. \nA. Small cell carcinoma, B. Large cell carcinoma, C. Squamous cell carcinoma, D. Adenocarcinoma', 'role': 'user'}, {'content': "Answer: D \nExplanation: .Adenocarcinoma is now the most common of the NSCLC types, having oveaken squamous cancer.The increasing incidence is paly due to an increasing incidence in women and may be the result, in pa, of a move towards lower-tar cigarettes that are inhaled more deeply to get the same effect. Reference:Bailey & Love's sho practise of surgery,25th edition,page no:884", 'role': 'assistant'}]