**Core Concept**
Homonymous hemianopia refers to the loss of vision in the same half of the visual field in both eyes, resulting from a lesion in the visual pathway posterior to the optic chiasm. This condition can occur due to damage in various structures, including the optic radiations, visual cortex, and lateral geniculate body.

**Why the Correct Answer is Right**
Lesions in the visual cortex (C) can cause homonymous hemianopia due to the destruction of the visual processing areas. The visual cortex is responsible for processing visual information, and damage to this area can result in loss of vision in the same half of the visual field in both eyes. Similarly, lesions in the optic radiations (B) can also cause homonymous hemianopia, as these fibers carry visual information from the lateral geniculate body to the visual cortex. The lateral geniculate body (A) is a structure in the thalamus that relays visual information from the optic nerves to the visual cortex, and damage to this area can also result in homonymous hemianopia. The sparing of pupillary reflexes is a key feature of lesions in these structures, as the pupillary reflexes are mediated by the afferent fibers in the optic nerves, which are not affected by lesions in the visual pathway posterior to the optic chiasm.

**Why Each Wrong Option is Incorrect**
**Option A:** The lateral geniculate body is responsible for relaying visual information from the optic nerves to the visual cortex, but lesions in this area alone would not typically cause homonymous hemianopia with sparing of pupillary reflexes.

**Option B:** Optic neuritis or damage to the optic nerve can cause unilateral visual loss, including loss of pupillary reflexes, but would not typically result in homonymous hemianopia.

**Option C:** Lesions in the visual cortex can cause homonymous hemianopia, but would not typically spare the pupillary reflexes, as the pupillary reflexes are mediated by the afferent fibers in the optic nerves.

**Clinical Pearl / High-Yield Fact**
It is essential to remember that homonymous hemianopia with sparing of pupillary reflexes is a characteristic feature of lesions in the visual pathway posterior to the optic chiasm, including the optic radiations, visual cortex, and lateral geniculate body.

**✓ Correct Answer: D. All of the above. All of the above structures can cause homonymous hemianopia with sparing of pupillary reflexes.**