text: <unk>  pneumonitis involves inhalation of organic dusts which act as an antigen. This leads to an exaggerated immune response, which is called<unk>  reactions. In<unk>  pneumonitis, its either Type III<unk>  or type IV<unk> .
option_0: Hypersensitivity pneumonitis pathophysiology
option_1: Idiopathic interstitial pneumonia pathophysiology
option_2: Cryptogenic organizing pneumonia pathophysiology
option_3: Idiopathic pulmonary fibrosis pathophysiology
option_4: Hypersensitivity pneumonitis risk factors
option_5: Emphysema pathophysiology
option_6: Bronchiolitis pathophysiology
option_7: Pulmonary edema pathophysiology