All are branches of lumbar plexus except :: (A) Obturator nerve, (B) Sub costal nerve, (C) Iliohypogastric, (D) Ilioinguinal
Answer is B. 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.