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': 'Heart failure cells are seen in? \nSelect and explain. \nA. Pulmonary infarction, B. Pulmonary edema, C. Pneumonia, D. Pulmonary embolism', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Pulmonary edema * Heart failure cells are Hemosiderin laden alveolar macrophages.* Heart failure cells are a manifestation of pulmonary congestion and edema (as seen in heart failure).* Pulmonary edema & pulmonary infarction can be differentiated by the presence of heart failure cells in pulmonary edema.", 'role': 'assistant'}]