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
True about primary chancre - 
Select and explain. 
A. Painless ulcer, B. Painless lymphadenopathy, C. Covered with exudate, D. All
D: All
Answer: D: All 
Explanation: Ans. is 'a' i.e., Painless ulcer; 'b' i.e., Painless lymphadenopathy; 'c' i.e., Covered with exudate Features of Primary Sore (Chancre) of syphilis I. Single lesion Painless Inducated base Associated with painless lymphadenopathy, bilateral. Exudation with discharging serous fluid. Option 'e' is slightly tricky. Spirochetes are abundant in the lesions of primary and secondary syphilis. So, organism can be isolated from chancre. But, as you all know, T. pallidum cannot be cultivated in aificial culture media.