This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Abdomen & Pelvis, Subject name: Anatomy
[{'content': 'Which of the following is the artery for endometrial blood supply? \nSelect and explain. \nA. Endometrial artery, B. Myometrial artery, C. Spiral artery, D. Cervical artery', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. C Spiral arteryRef: Gray's Anatomy E-book, P 172* Spiral artery, a branch of radial artery, chiefly supplies endometrium.* Endometrium and myometrium are supplied mainly by ovarian and uterine artery.", 'role': 'assistant'}]