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': 'True statements about lower one fouh of anterior abdominal wall except \nSelect and explain. \nA. Linea Alba is poorly formed, B. Two layers of rectus sheath present, C. Only anterior layer of rectus sheath present, D. External oblique muscle well formed and strong', 'role': 'user'}, {'content': 'Answer: B \nExplanation: In lower one fourh , linea alba is not well formed. Both left and recti are close. Only anterior sheath of rectus is present. External oblique is well formed and strong Ref - BDC 6e vol2 pg 196', 'role': 'assistant'}]