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': 'Renal angle is formed by 12th rib and- \nSelect and explain. \nA. Vertebral column and erector spinae, B. Sacrospinalis, C. Rectus abdominis, D. External oblique', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Vertebral column and erector spinae * The costovertebral angle/renal angle is the acute angle formed on either side of the human back between the twelfth rib and the vertebral column or erector spinae* The kidney lies directly below this area and tenderness may be palpated here.", 'role': 'assistant'}]