This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Forensic Medicine
The average fatal period of copper poisoning is 
Select and explain. 
A. 30-60 minutes, B. 1-3 days, C. 3-7 days, D. 7-14 days
B: 1-3 days
Answer: B: 1-3 days 
Explanation: B i.e. 1 - 3 days