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: Dental
In lake water, the highest fluoride value ever recorded in 2800 PPM. In which country this lake is situated: 
Select and explain. 
A. Japan, B. Kenya, C. Libya, D. South Africa
B: Kenya
Answer: B: Kenya 
Explanation: None