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: Skin
H. ducreyi causes: 
Select and explain. 
A. Soft chancre, B. Hard chancre, C. Pustule, D. Painless chancre
A: Soft chancre
Answer: A: Soft chancre 
Explanation: Soft chancre