This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Impoant Bacterial Diseases in Children, Subject name: Pediatrics
A 4-year-old child presented with cough persisting for 1 month & low grade fever. There was a history of contact with TB. What is the chest X ray of the child given below suggestive of? 
Select and explain. 
A. Pleural efusion, B. Miliary TB, C. Cavitation, D. Primary TB
D: Primary TB
Answer: D: Primary TB 
Explanation: Chest X Ray showing lung parenchymal lesion with enlarged hilar lymph nodes, in a child with persistent cough, fever & history of contact with TB points towards 'Primary TB'.