This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Abdomen and pelvis, Subject name: Anatomy
[{'content': 'The rectus sheath contains all of the following except \nSelect and explain. \nA. Pyramidalis muscle, B. Genitofemoral nerve, C. Inferior epigastric vessels, D. Superior epigastric vessels', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The rectus sheath is formed by the aponeuroses of the transverse abdominal and the external and internal oblique muscles. It contains the rectus abdominis and pyramidalis muscles. It can be divided into anterior and posterior laminae. <img src=" /> Ref - BDC 6e Vol2 pg209', 'role': 'assistant'}]