This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Forensic Toxicology - Concepts, Statutes, Evidence, and Techniques, Subject name: Forensic Medicine
[{'content': "Vineyard sprayer's lung is due to? \nSelect and explain. \nA. Thallium toxicity, B. Chronic CuSO4 poisoning, C. Chronic arsenic poisoning, D. Potassium permanganate toxicity", 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. (b) Chronic CuS04 poisoningRef. Forensic medicine and toxicology R.N. Karmakar, 3/e, p 94, Clinical immunotoxicology by David S. Newcombe, p 233', 'role': 'assistant'}]