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': "Radiological hallmark of primary tuberculosis in childhood is? \nSelect and explain. \nA. Ghon's focus, B. Normal chest Xray, C. Lymphadenopathy, D. Pleural effusion", 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Lymphadenopathy Lymphadenopathy with or without parenchymal abnormality is the radiological hallmark of primary tuberculosis in childhood.", 'role': 'assistant'}]