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': 'Causes of vulval pain are due to all except: \nSelect and explain. \nA. Neuralgia of the genitofernoral nerve, B. Herpes, C. Vulval vestibulitis syndrome, D. Lichen sclerosus', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Vulval pain syndrome\nVulvar pain sensation may be burning, stinging or irritation. It may be due to several reasons:\n\nAphthous ulcer\nVulval dermatoses\nHerpes genitalis\nPudendal or genitofemoral nerve neuralgia\nVulvodynia (burning vulva syndrome)\nVulval vestibulitis syndrome\nReferred pain from urethral or vagina\nPsychological', 'role': 'assistant'}]