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
[{'content': '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: \nSelect and explain. \nA. Herpes genitalis, B. LGV, C. Primary chancre, D. Chancroid', 'role': 'user'}, {'content': 'Answer: D \nExplanation: 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', 'role': 'assistant'}]