This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiratory system, Subject name: Anatomy
[{'content': 'All the following statements about primary T.B Except \nSelect and explain. \nA. Cavitary lesion, B. Pleural effusion, C. Fibrocasseous lesion, D. Phlyctenular conjunctivitis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Cavitary lesion are a feature of post primary or secondary T.B and not primary T.B cases Ref Harrison 19th edition pg 1108', 'role': 'assistant'}]