Q:

Which one of the following statements is true for farmer’s lung regarding its causation?

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Which one of the following statements is true for farmer’s lung regarding its causation?


  1. It occurs due to inhalation of fumes
  2. It occurs due to inhalation of moldy hay or grain dust
  3. It occurs due to inhalation of free silica or silicon-dioxide
  4. It occurs due to inhalation of cotton fiber dust
  5. It occurs due to inhalation of sugar-cane dust

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