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: Pathology
Syphilis becomes seropositive in 
Select and explain. 
A. Chancre (primary syphilis), B. Muco patches (secondary syphilis), C. Gurnma (tertiary syphilis), D. Congenital syphilis
B: Muco patches (secondary syphilis)
Answer: B: Muco patches (secondary syphilis) 
Explanation: None