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: Radiology
[{'content': 'Miliary mottling on X-ray chest is seen in – a) Histoplasmosisb) Sarcoidosisc) Secondaries from Ca. colond) Gonococal pneumonia \nSelect and explain. \nA. ab, B. abc, C. acd, D. bcd', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]