Which is not a true arterial anastomosis?

**Core Concept**
The question tests knowledge of arterial anastomoses, which are critical for maintaining blood flow to tissues. Arterial anastomoses are connections between two or more arteries that provide alternative routes for blood flow.

**Why the Correct Answer is Right**
A true arterial anastomosis is a direct connection between two arteries, allowing for blood flow between them.

**Why Each Wrong Option is Incorrect**
**Option A:**
**Option B:**
**Option C:**

**Clinical Pearl / High-Yield Fact**
Arterial anastomoses are crucial for preventing ischemia in tissues.

**Correct Answer: D.**

✓ Correct Answer: D. Cerebral cortical arteries