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: Dental
[{'content': "Noninfective cause of genital ulcer is - \nSelect and explain. \nA. Behcets disease, B. Hansen's disease, C. Ramsons's disease, D. Syphilis", 'role': 'user'}, {'content': "Answer: A \nExplanation: Bechet's disease is characterized by a triad of recurrent oral ulcers (aphthous ulcers), recurrent genital ulcers and uveitis.\nImportant non-infective causes of genital ulcer are Trauma, Bechet's disease, Stevens-Johnson syndrome and carcinoma.", 'role': 'assistant'}]