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: Pathology
[{'content': 'Bronchiectasis means-----of bronchi - \nSelect and explain. \nA. Inflammation, B. Dilatation, C. Cavitation, D. All', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Bronchiectasis \n\nBronchiectasis is a disease characterized by permanent dilatation of bronchi and bronchioles caused by the destruction of the muscle and elastic tissue, resulting from or associated with chronic necrotizing infections.\nBronchiectasis is associated with -\n\n1.\xa0\xa0 Congenital conditions\n\nCystic fibrosis\nPrimary ciliary dyskinesia (Kartagener syndrome)\nIntralobar sequestration of the lung.\n\n2.\xa0\xa0 Post infectious necrotizing pneumonia\n\nBacteria\xa0→ M. Tuberculosis, staph. aureus, H. influenzae, Pseudomonas.\nViruses\xa0→ Adenovirus, HIV, influenza virus.\nFungus\xa0→ Allergic bronchopulmonary aspergillosis.\n\n3.\xa0Bronchial obstruction\xa0→ Tumor, foreign body, mucus impaction.\n4.\xa0Other conditions\xa0→ RA, SLE, IBD, post-transplantation.', 'role': 'assistant'}]