Cause of Farmer's lung-: (A) Cotton dust, (B) Grain dust, (C) Sugarcane dust, (D) Iron
Answer is B. - farmers lungs is due to the inhalation of mouldy or hay grain dust. - micropolyspora faeni is the main cause of farmer's lung. - repeated attacks cause pulmonary fibrosis, inevitable pulmonary damage and cor pulmonale. Reference: Park's textbook of preventive and social medicine, 23rd edition, pg no:807 <\p>