This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Development of GU system and Neuro-vascular supply of pelvis & perineum, Subject name: Anatomy
A 32-year-old patient with multiple fractures of the pelvis has no cutaneous sensation in the urogenital triangle. The function of which of the following nerves is most likely to be spared? 
Select and explain. 
A. Ilioinguinal nerve, B. Iliohypogastric nerve, C. Posterior cutaneous nerve of the thigh, D. Pudendal nerve
B: Iliohypogastric nerve
Answer: B: Iliohypogastric nerve 
Explanation: The iliohypogastric nerve innervates the skin above the pubis. The skin of the urogenital triangle is innervated by the pudendal nerve, perineal branches of the posterior femoral cutaneous nerve, anterior scrotal or labial branches of the ilioinguinal nerve, and the genital branch of the genitofemoral nerve.