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: Social & Preventive Medicine
All are true about Yaws except 
Select and explain. 
A. Caused by Treponema pertenue, B. Transmitted non-venerally, C. Later stages involve heart and nerves, D. Secondary Yaws can involve bones
C: Later stages involve heart and nerves
Answer: C: Later stages involve heart and nerves 
Explanation: None