During lumbosacral extension, the l5 extends as the sacral base flexes. Hence, the answer is (d). The anterior rami of spinal nerves L4 to L5 and S1 to S4 make up the lumbosacral plexus.
The lumbar and sacral spinal nerve roots, which separate to produce the nerves feeding the lower leg, give rise to the lumbosacral plexus, a network of nerve fibers. There are 31 pairs of spinal nerves in the human body, and each pair is connected to a specific section of the vertebral column. These 31 pairs include the body's cervical (C1-C8), thoracic (T1-T12), lumbar (L1-L5), sacral (S1-S5), and coccygeal areas. The brachial and lumbosacral plexuses, from which the nerves of the upper and lower limbs, respectively, emerge, are formed when the appropriate spinal nerves in the cervical and lumbar regions meet.
To learn more about lumbosacral plexus click on the given link: brainly.com/question/29562971
#SPJ4
