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': "Histopatholoty of a lung cancer shows 'clara cells' probable diagnosis is - \nSelect and explain. \nA. Squamous cell cancer, B. Bronchio alveolar cancer, C. Large cell cancer, D. Papillary carcinoma", 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. is \'b\' i.e., Bronchio alveolar cancer "Ultrastructurally bronchoalveolar carcinoma are a heterogenous group, consisting of mucin secreting bronchiolar cells clara cells or rarely type II penumocytes".', 'role': 'assistant'}]