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: Unknown
[{'content': 'Which of the following is not a feature of ABPA \nSelect and explain. \nA. High lgE level, B. Recurrent pneumonia, C. Occurrence in patients with old cavitary lesions, D. Pleural effusion', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ref. API Textbook of Medicine. Pg. 1751\n\xa0\nAllergic Bronchopulmonary Aspergillosis\n\nABPA represents a hypersensitivity reaction to A. fumigatus; rare cases are due to other aspergilli and other fungi.\nABPA occurs in ~1% of patients with asthma and in up to 15% of adults with cystic fibrosis; occasional cases are reported in patients with neither of the latter.\nEpisodes of bronchial obstruction with mucous plugs leading to coughing fits, "pneumonia," consolidation, and breathlessness are typical.\nMany patients report coughing up thick sputum casts, usually brown or clear.\nEosinophilia commonly develops before systemic glucocorticoids are given.\nThe cardinal diagnostic tests include an elevated serum level of total IgE (usually >1000 IU/mL), a positive skin-prick test to A. fumigatus extract, or detection of Aspergillus-specific IgE and IgG (precipitating) antibodies.\nCentral bronchiectasis is characteristic', 'role': 'assistant'}]