This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Sarcoidosis, Subject name: Pathology
[{'content': "Caplan's syndrome is seen in: \nSelect and explain. \nA. COPD, B. Pneumoconiosis, C. Pulmonary edema, D. Bronchial asthma", 'role': 'user'}, {'content': "Answer: B \nExplanation: Caplan's syndrome is a combination of rheumatoid ahritis (RA)and pneumoconiosis that manifests as intrapulmonary nodules, which appear homogenous and well-defined on chest X-ray. -When a person with rheumatoid ahritis is exposed to such offensive materials, they are at an increased risk of developing pneumoconiosis.", 'role': 'assistant'}]