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': 'Dust cells can be found in the _____. \nSelect and explain. \nA. Brain, B. Heart, C. Lungs, D. Liver', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Dust cells, along with heart failure cells, are macrophages that are found in the lungs. They are part of the reticuloendothelial system.', 'role': 'assistant'}]