**Core Concept**
Rhegmatogenous retinal detachment occurs when a tear or hole in the retina allows fluid to seep underneath the retina, leading to its separation from the underlying retinal pigment epithelium. This type of detachment is the most common form, accounting for approximately 85% of cases.

**Why the Correct Answer is Right**
Rhegmatogenous retinal detachment typically results from the formation of a retinal tear or hole, often due to age-related changes, trauma, or posterior vitreous detachment. The tear or hole provides a pathway for fluid to enter the subretinal space, causing the retina to detach. The vitreous gel, which fills the center of the eye, can also pull on the retina, exacerbating the detachment. In rhegmatogenous retinal detachment, the break in the retina allows the vitreous to enter the subretinal space, leading to the characteristic serous or hemorrhagic fluid accumulation.

**Why Each Wrong Option is Incorrect**
**Option B:** Choroidal hemorrhage is a type of exudative retinal detachment, not a distinct category. It occurs when blood accumulates beneath the retina due to a rupture in the choroid, a vascular layer between the sclera and retina.

**Option C:** Exudative retinal detachment is a less common form of detachment, accounting for approximately 10% of cases. It occurs when fluid accumulates under the retina due to various causes, such as choroidal neovascularization, central serous chorioretinopathy, or inflammatory conditions.

**Option D:** Tractional retinal detachment is a less common form of detachment, often associated with diabetic retinopathy or other conditions that cause fibrovascular proliferation. It occurs when fibrotic tissue contracts and pulls the retina away from the underlying retinal pigment epithelium.

**Clinical Pearl / High-Yield Fact**
Rhegmatogenous retinal detachment is often asymptomatic in its early stages, making regular eye exams crucial for detection. A sudden onset of floaters or a curtain-like shadow in the peripheral vision may indicate a retinal detachment.

**✓ Correct Answer: A. Rhegmatogenous**