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: Gynaecology & Obstetrics
[{'content': "Ulceration of the vulva is commonly seen in all except: \nSelect and explain. \nA. Bacterial vaginosis, B. Syphilis, C. Chancroid, D. Behget's disease", 'role': 'user'}, {'content': 'Answer: A \nExplanation: Vulval ulcers\nVulval ulcers are predominantly due to sexually transmitted diseases. Rarely, it may be due to non-specific causes.\nMalignant ulcer is also rare. The various etiological factors related to vulval ulcers are given in the below Table.\nTable: Ulcers of the Vulva', 'role': 'assistant'}]