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
A hetero sexual male presents with multiple non-indurated painful ulcers with undermined edges and enlarged lymph nodes 5 days after exposure. Most likely diagnosis is: 
Select and explain. 
A. Herpes genitalis, B. LGV, C. Primary chancre, D. Chancroid
D: Chancroid
Answer: D: Chancroid 
Explanation: Painful, non indurated, acute, tender ulcers with undermined irregular edges are characteristic of chancroid, a sexually transmitted disease of sho incubation period caused by Haemophilus ducreyi. Ref: Textbook of Dermatology, Venereology and Leprology By Devinder Mohan Thappa, 2nd Edition, Chapter 28, Pages 286-87