**Core Concept**
Benign paroxysmal positional vertigo (BPPV) is a vestibular disorder characterized by brief, episodic vertigo triggered by specific head movements. It is a common cause of vertigo, particularly in older adults. The pathophysiology of BPPV involves the displacement of otoconia from the utricle or saccule into the semicircular canals, leading to abnormal stimulation of the vestibular nerve.

**Why the Correct Answer is Right**
Good reproducibility is not a characteristic of BPPV. This is because the symptoms of BPPV are highly variable and can be influenced by several factors, including the position of the head, the direction of gaze, and the presence of other vestibular or neurological disorders. In contrast, BPPV typically exhibits poor reproducibility, meaning that the symptoms may not be consistently reproducible in different testing situations. The other options are characteristic of BPPV: fatigability refers to the decrease in symptom severity over repeated testing, habituation refers to the decrease in symptom severity over time, and latency refers to the delayed onset of symptoms.

**Why Each Wrong Option is Incorrect**
**Option A:** Fatigability is actually a characteristic of BPPV, as the symptoms may decrease in severity over repeated testing.
**Option C:** Habituation is also a characteristic of BPPV, as the symptoms may decrease in severity over time.
**Option D:** Latency is a characteristic of BPPV, as the symptoms may have a delayed onset.

**Clinical Pearl / High-Yield Fact**
It's essential to note that BPPV is often associated with other vestibular disorders, such as Meniere's disease or labyrinthitis. A thorough history and physical examination, including vestibular testing, are necessary to diagnose BPPV accurately.

✓ Correct Answer: B. Good reproducibility