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: Unknown
[{'content': 'Carcinoma of vulva is: \nSelect and explain. \nA. Columnar cell carcinoma, B. Transitional cell carcinoma, C. Adenocarcinoma, D. Squamous cell carcinoma', 'role': 'user'}, {'content': "Answer: D \nExplanation: Squamous cell carcinoma is the most frequent form of cancer of the vulva. Malignant melanoma should be reported separately. Histopathologic types are:\n\nVulvar intraepithelial neoplasia, Grade III, squamous cell carcinoma in situ\nSquamous cell carcinoma\nVerrucous carcinoma\nPaget's disease of vulva\nAdenocarcinoma, not otherwise specified (NOS)\nBasal cell carcinoma, NOS\n\nBartholin gland carcinoma", 'role': 'assistant'}]