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': 'Ovarian artery is a branch of: \nSelect and explain. \nA. Abdominal aorta, B. Internal iliac artery, C. External iliac artery, D. Inferior mesenteric artery', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. A Abdominal aortaRef: Clinically Oriented Anatomy by Keith, Moore, 5th ed. pg. 387; Gray\'s Anatomy, 40th ed. Ch. 62* The ovarian artery/testicular arises from the abdominal aorta.* The ovarian arteries are branches of the abdominal aorta and originate below the renal arteries. That\'s the reason it is sometimes also referred as "water under the bridge"* The ovarian veins emerge from the ovary as a plexus (pampiniform plexus) in the mesovarium and suspensory ligament.* Abdominal aorta divides into right and left common iliac artery at the level of L4 (Gray\'s) which further divides into internal and external iliac arteries supplying the organs of pelvis.* Length of right iliac artery: 5 cmQ* Length of left iliac artery: 4 cmQ', 'role': 'assistant'}]