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: Medicine
[{'content': 'Profuse expectoration of two months durations and clubbing may be seen \nSelect and explain. \nA. Sarcoidosis, B. Polyaeritis nodosa, C. Pulmonary aery hypeension, D. Allergic bronchopulmonary aspergillosis', 'role': 'user'}, {'content': "Answer: D \nExplanation: Allergic bronchopulmonary aspergillosis represents a hypersensitivity reaction to Aspergillus fumigatus.Episodes of bronchial obstruction with mucous plugs leading to coughing 'fits',breathlessness,pulmonary infiltrates.It can result in the development of bronchiectasis.Clubbing can be seen in this case. Reference:Harrison's Medicine-18th edition,page no:1658;Davidson's Medicine-22nd edition,page no:697.", 'role': 'assistant'}]