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
[{'content': 'A patient has multiple necrotic ulcers over glans penis with tender inguinal lymphadenopathy. The likely diagnosis is - \nSelect and explain. \nA. Haemophilous ducreyi, B. Chlamydia trachomatis, C. Herpes simplex, D. Candida albicans', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]