<prompt> Profuse expectoration of two months durations and clubbing may be seenSarcoidosisPolyaeritis nodosaPulmonary aery hypeensionAllergic bronchopulmonary aspergillosis  <response>: 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:Harrisons Medicine-18th edition,page no:1658;Davidsons Medicine-22nd edition,page no:697. 