Final answer:
The ventral rami of the C5-T1 spinal segments give rise to the brachial plexus, femoral nerve, and sciatic nerve. Therefore, correct answer is D.
Step-by-step explanation:
The ventral rami of the C5-T1 spinal segments are responsible for innervating various muscles and areas of the upper limbs. One major nerve that emerges from this region is the brachial plexus.
It is formed by the reorganization of spinal nerves C4-T1 and gives rise to the nerves of the arms. Another major nerve that arises from the lumbar plexus (formed by the lumbar spinal nerves) is the femoral nerve.
It is responsible for innervating the pelvic region and the anterior leg. The sciatic nerve is a significant nerve that originates from the sacral plexus (formed by the lower lumbar and sacral nerves).
It is a combination of the tibial and fibular nerves and extends across the hip joint into the upper posterior leg.