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: Medicine
True regarding presentation of primary T.B. is - 
Select and explain. 
A. B/L pleural effusion with negative Tuberculin test., B. U/L hilar lymphadenopathy, C. Sustained chronic pyrexia, D. B/L pelural effusion with positive tuberculin test.
B: U/L hilar lymphadenopathy
Answer: B: U/L hilar lymphadenopathy 
Explanation: None