## Core Concept
The question tests understanding of the **spinothalamic tract**, which is responsible for transmitting sensations of pain, temperature, itch, and crude touch. The ventrolateral spinal cord is the location of the lateral and anterior spinothalamic tracts. These tracts are crucial for the transmission of pain and temperature sensations.

## Why the Correct Answer is Right
The correct answer, **Brown-Séquard syndrome**, results from a lesion in one half of the spinal cord, which affects the lateral spinothalamic tract (pain and temperature sensation) on the opposite side of the body below the level of the lesion, and the posterior columns (vibration, proprioception) on the same side as the lesion below the level of the lesion. However, when specifically referring to a ventrolateral lesion, it primarily impacts the spinothalamic tracts. This leads to **contralateral** loss of pain and temperature sensation below the lesion level, which matches the expected outcome of such a lesion.

## Why Each Wrong Option is Incorrect
- **Option A:** This option is incorrect because it does not accurately describe the consequence of a ventrolateral spinal cord lesion.
- **Option B:** This option does not accurately represent the clinical presentation associated with a ventrolateral lesion of the spinal cord.
- **Option D:** This option is incorrect as it does not correspond with the known effects of a lesion to the ventrolateral part of the spinal cord.

## Clinical Pearl / High-Yield Fact
A key point to remember is that a lesion affecting the **ventrolateral quadrant** of the spinal cord results in **Brown-Séquard syndrome**, characterized by ipsilateral weakness (or paralysis) and loss of proprioception (position sense) below the lesion, and contralateral loss of pain and temperature sensation below the lesion. This classic syndrome helps in localizing spinal cord lesions.

## Correct Answer: B.