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: Anatomy
[{'content': 'Blood supply of the upper part of the vagina - \nSelect and explain. \nA. Middle rectal artery, B. Internal pudendal artery, C. Cervicovaginal branch of uterine artery, D. Superior rectal artery', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Arterial supply of vagina\n-\xa0\xa0\xa0\xa0\xa0\xa0\xa0 Main supply- Internal iliac vaginal branch\n-\xa0\xa0\xa0\xa0\xa0\xa0\xa0 Upper part- Uterine artery cervicovaginal branch\n-\xa0\xa0\xa0\xa0\xa0\xa0\xa0 Lower part- middle rectal and internal pudendal arteries.', 'role': 'assistant'}]