<prompt> Which of the following nerve is not a branch of lumbar plexus?Obturator nerveFemoral nerveSciatic nerveLateral cutaneous nerve of thigh  <response>: The lumbar plexus is formed by ventral ranmi of L1, L2, L3, and pa of L4. These rami divide into dorsal and ventral divisions. From ventral division of these rami arise ilioinguinalL1, genitofemoralL1, L2, obturator L2, L3, L4, accessory obturator L3, L4 nerves. The dorsal divisions of these rami give rise to lateral cutaneous nerve of thighL2, L3, femoral nerve L2, L3, L4. Iliohypogastric contains fibres of both ventral and dorsal divisions. Ref: Chaurasias Human Anatomy 6th edition. Pg:441,442. 