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: Microbiology
Yaws is caused by - 
Select and explain. 
A. Treponema pallidum, B. Treponema carateum, C. Treponema refringens, D. Treponema pertenue
D: Treponema pertenue
Answer: D: Treponema pertenue 
Explanation: None