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
[{'content': "All of the following statements about 'yaws' are true, except: \nSelect and explain. \nA. Caused by Treponema paeunae, B. Transmitted non venerally, C. Secondary yaws can involve bone, D. Late stages of yaws involve hea and nerves", 'role': 'user'}, {'content': 'Answer: D \nExplanation: Late Yaws is characterized by destructive and deforming lesions of skin, periosteum and bone. The late cardiac and cerebral manifestations of venereal syphilis, which is often severe, does not occur in yaws. Ref: Preventive and Social Medicine, by K.Park, 19th edition, Page 283, 284', 'role': 'assistant'}]