This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Lower limb, Subject name: Anatomy
All are branches of lumbar plexus except : 
Select and explain. 
A. Obturator nerve, B. Sub costal nerve, C. Iliohypogastric, D. Ilioinguinal
B: Sub costal nerve
Answer: B: Sub costal nerve 
Explanation: Subcostal nerve is an anterior division of 12 the thoracic nerve which is larger than other intercostal nerves. Ref: Gray's Anatomy The Anatomical Basics of Clinical Practice 41 e pg 1371.