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: Medicine
In primary syphillis the lesion seen is- 
Select and explain. 
A. Indurated ulcer, B. Multiplicity of lesion, C. Painful ulcer, D. Bleeding ulcer
A: Indurated ulcer
Answer: A: Indurated ulcer 
Explanation: None