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
[{'content': 'True regarding presentation of primary T.B. is \nSelect and explain. \nA. B/L pleural effusion with negative Tuberculin test, B. U/L hilar lymphadenopathy, C. Sustained chronic pyrexia, D. B/L pleural effusion with positive tuberculin test', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Answer is B (Unilateral hilar lymphadenopathy): Unilateral hilar lymphadenopathy as pa of the primary complex is a characteristic feature of primary tuberculosis Primary tuberculosis: It is the first infection with tubercle bacilli in individuals who have not been previously exposed to the organisms Seen in children Q Primary complex is characteristic Primary (Ghon) complex Unilateral enlarged hilar lymph nodes (1 Ghon focus Q:Epitheloid-cell granulomatous inflammation (consolidation) at site of parenchymal infection. Usually small and subpleural most commonly located under pleura in lower pa of upper lobe Usually a symptomatic Q or manifested by a mild flu like illness at time of tuberculin conversion', 'role': 'assistant'}]