**Core Concept**
Exudative retinal detachment occurs due to the accumulation of serous or hemorrhagic fluid in the subretinal space, often resulting from inflammation, vascular abnormalities, or neoplastic conditions. This type of detachment is characterized by the presence of fluid leaks from retinal vessels or other sources.

**Why the Correct Answer is Right**
The correct answer, **c) Harada's syndrome**, is a condition that causes exudative retinal detachment due to inflammation and leakage of serous fluid from the uveal tract. Harada's syndrome, also known as Vogt-Koyanagi-Harada disease, is a systemic autoimmune disorder that affects the eyes, skin, and meninges, leading to panuveitis and subsequent retinal detachment.

**Why Each Wrong Option is Incorrect**
**Option A:** Central retinal artery occlusion typically causes ischemic retinal damage rather than exudative detachment.
**Option B:** Hypertensive retinopathy can cause retinal hemorrhages and cotton wool spots but is not a primary cause of exudative retinal detachment.
**Option D:** Coat's disease is a condition that causes retinal detachment due to telangiectasia and retinal vascular abnormalities, but it is typically characterized by a different pathophysiology.

**Clinical Pearl / High-Yield Fact**
Exudative retinal detachment often requires prompt treatment to prevent permanent vision loss, and its diagnosis involves distinguishing it from other types of retinal detachment, such as rhegmatogenous or tractional detachment.

**Correct Answer:** C. Harada's syndrome