This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiration, Subject name: Pathology
[{'content': 'Cells most important in causation of asthma are? \nSelect and explain. \nA. Macrophages, B. Mast cells, C. Neutrophils, D. Lymphocytes', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Mast cells * Asthma is type 1 hypersensitivity reaction and Mast cells are the most important cells in type I hypersensitivity.", 'role': 'assistant'}]