Which of the following is a component of the coccygeal nerve plexus?

The coccygeal nerve plexus is primarily formed by the last lumbar nerves and the sacral nerves, specifically including the S4 and S5 spinal nerves as well as the coccygeal nerve (C0). These components are responsible for innervating areas around the tailbone (coccyx) region and contributing to the pelvic floor's sensory and motor functions.

The spinal nerves from S4 and S5 provide crucial signals for the perineum and pelvic structures, while the coccygeal nerve plays a role in sensation to the skin over the coccyx. Understanding this organization is essential for grasping how various areas of the pelvic region receive innervation and how these nerves can influence functions such as bladder control and sexual functions.

In contrast, other options listed consist of different sets of spinal nerves not associated with the coccygeal plexus. For instance, the first option covers a different cervical region, while the third involves nerves from a different segment of the spinal column, and the fourth combines lumbar segments that contribute to different plexuses entirely. Thus, focusing on the specific spinal nerves associated with the coccygeal plexus clarifies why B is the correct choice.