**Core Concept**
Neovascular glaucoma is a severe form of secondary glaucoma characterized by the growth of new, fragile blood vessels on the iris and trabecular meshwork, leading to increased intraocular pressure and vision loss. It often results from ischemia in the eye, triggering the release of angiogenic factors that stimulate neovascularization.

**Why the Correct Answer is Right**
Central serous retinopathy, also known as central serous chorioretinopathy (CSCR), is a condition where fluid accumulates under the retina, causing a detachment and visual distortion. Unlike other conditions listed, CSCR does not typically lead to ischemia or neovascularization, making it an unlikely cause of neovascular glaucoma.

**Why Each Wrong Option is Incorrect**
**Option A:** Intraocular tumors can indeed cause neovascular glaucoma by producing angiogenic factors and leading to ischemia in the surrounding tissue.

**Option B:** Central retinal vein occlusion (CRVO) can cause neovascular glaucoma due to the resulting retinal ischemia and release of vascular endothelial growth factor (VEGF), a potent angiogenic factor.

**Option C:** Diabetic retinopathy is a well-known cause of neovascular glaucoma, as the ischemic retina releases angiogenic factors, leading to the growth of new blood vessels.

**Clinical Pearl / High-Yield Fact**
Neovascular glaucoma is often associated with conditions that cause retinal ischemia, and its management typically involves addressing the underlying cause, such as treating diabetic retinopathy or removing intraocular tumors.

**✓ Correct Answer: D. Central serous retinopathy**