This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Imaging of Alveolar Lung Disease, 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., Lymph adenopathy Primary tuberculosis in childhoodo Primary' tuberculosis in childhood can present in 4 major ways in addition to the normal chest radiography. These are:LymphadenopathyLobar or segmental parenchymal diseasePleural effusionMilitary involvemento Lymphadenopathy with or without parenchymal abnormality' is the radiological hallmark of primary tuberculosis in childhood.