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': 'Skin immediately around the umbilicus is supplied by \nSelect and explain. \nA. Anterior cutaneous branches of thoracoabdominal nerve T10, B. Lateral cutaneous branches of thoracoabdominal nerve T10, C. Anterior cutaneous branches of thoracoabdominal nerve T12, D. Lateral cutaneous branches of thoracoabdominal nerve T12', 'role': 'user'}, {'content': 'Answer: A \nExplanation: The immediately around the umbilicus is supplied by the 10th thoracic spinal nerve. The umbilicus itself lies in the junction of the veebrae L3 and L4. ref - BDC 6e vol2 pg198-200', 'role': 'assistant'}]