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
All of the following statements about 'yaws' are true except - 
Select and explain. 
A. Caused by Treponema pertenue, B. Transmitted non venerally, C. Secondary yaws can involve bone, D. Late stages of yaws involve heart and nerves
D: Late stages of yaws involve heart and nerves
Answer: D: Late stages of yaws involve heart and nerves 
Explanation: None