<prompt> Vineyard sprayers lung is due to?Thallium toxicityChronic CuSO4 poisoningChronic arsenic poisoningPotassium permanganate toxicity  <response>: Ans. b Chronic CuS04 poisoningRef. Forensic medicine and toxicology R.N. Karmakar, 3e, p 94, Clinical immunotoxicology by David S. Newcombe, p 233 