This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Vermiform Appendix, Subject name: Surgery
[{'content': 'Nerve most commonly injured in Mac Burneys incision: \nSelect and explain. \nA. Subcostal, B. Iliohypogastric nerve, C. 11th thoracic, D. Illoinguinal', 'role': 'user'}, {'content': "Answer: B \nExplanation: Right inguinal hernia is more common following a grid iron (MC Burney's) incision for appendicectomy and is due to injury to the iliohypogastric nerve.", 'role': 'assistant'}]