In retinal artery angiogram dye injected through-
**Core Concept**
The question tests the understanding of **ophthalmic angiography**, specifically the route of dye injection for visualizing the retinal arteries. This procedure is crucial for diagnosing and managing retinal and ocular diseases.
**Why the Correct Answer is Right**
The correct answer involves understanding the anatomical pathway that allows for the visualization of the retinal arteries. The **ophthalmic artery**, a branch of the **internal carotid artery**, supplies blood to the eye, including the retinal arteries.
**Why Each Wrong Option is Incorrect**
**Option A:** Incorrect because it does not directly relate to the primary pathway for retinal artery angiography.
**Option B:** Incorrect as it is not the standard approach for injecting dye for this specific purpose.
**Option C:** Incorrect because, although related to eye anatomy, it is not the correct route for dye injection in retinal artery angiogram.
**Option D:** Incorrect as it is not directly associated with the procedure of retinal angiography.
**Clinical Pearl / High-Yield Fact**
A key point to remember is that the **internal carotid artery** plays a critical role in supplying the eye, and its branches are essential for procedures like angiography.
**Correct Answer:** Correct Answer: D. Common carotid artery