This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiration, Subject name: Pathology
[{'content': 'Which of the following is associated with hypersensitive pneumonitis \nSelect and explain. \nA. Silicosis, B. Asbestosis, C. Byssnosis, D. Berylliosis', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' Byssinosis None of the options mentioned are known to cause hypersensitivity pneumonitis but out of these Byssinosis is most closely related to Hypersensitivity pneumonitis.Hypersensitivity pneumonitis describes a spectrum of immunologically mediated*, predominantly interstitial lung disorders caused by intense, often prolonged exposure to inhaled organic dusts and related occupational antigens.Etiology: Inhalation of organic dust most commonly spores of thermophilic fungi*.Depending on the occupation or exposure of specific antigen numerous names have been given to hypersensitivity pneumonitis.Farmer's lung - Thermophilic actinomycete on Mouldy hay or grain dust*.Pigeon breeder's lung - Proteins from serum excreta or feathers of the birds.Air conditioner lung (or Humidifier lung) - Thermophilic bacteria in heated water reservoirs.Also rememberHypersensitivity pneumonitis in a type III & Type IV (both) hypersensitivity reaction*.", 'role': 'assistant'}]