Final answer:
The level that divides quadriplegia from paraplegia is T1. Quadriplegia involves paralysis of both arms and legs, while paraplegia affects the trunk, legs, and pelvic organs but spares arm function. Therefore correct option is B
Step-by-step explanation:
The level of the spinal cord that divides quadriplegia from paraplegia is crucial for understanding the potential outcomes of a spinal injury. Quadriplegia, which entails paralysis of the arms, hands, trunk, legs, and pelvic organs, occurs when there is an injury at or above the C5 level. In contrast, an injury at or below the T1 level typically results in paraplegia, affecting the trunk, legs, and pelvic organs, while sparing the use of the arms and hands.
Therefore, the correct answer to the question, "A lesion at what level of the spinal cord divides quadriplegia from paraplegia?" is b. T1.