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
Radiological hallmark of primary tuberculosis in childhood is? 
Select and explain. 
A. Ghon's focus, B. Normal chest Xray, C. Lymphadenopathy, D. Pleural effusion
C: Lymphadenopathy
Answer: C: Lymphadenopathy 
Explanation: Ans. is 'c' i.e., Lymphadenopathy Lymphadenopathy with or without parenchymal abnormality is the radiological hallmark of primary tuberculosis in childhood.