**Core Concept**
The internal iliac artery is a major branch of the common iliac artery, supplying the pelvic organs and walls. It gives off several branches that supply the pelvic floor, perineum, and lower limbs, but does not directly supply the thigh via the femoral artery.

**Why the Correct Answer is Right**
The femoral artery is a **direct continuation** of the external iliac artery, which arises from the common iliac artery, not the internal iliac artery. The internal iliac artery branches include the obturator artery, middle rectal artery, and internal pudendal artery—all of which supply pelvic structures. The femoral artery is not a branch of the internal iliac artery; it is formed distally from the external iliac artery, which is a separate vessel.

**Why Each Wrong Option is Incorrect**
Option A: The obturator artery is a well-known branch of the internal iliac artery, supplying the adductor muscles of the thigh.
Option B: The middle rectal artery arises from the internal iliac artery and supplies the rectum.
Option D: The internal pudendal artery is a direct branch of the internal iliac artery, supplying the perineum and pelvic floor.

**Clinical Pearl / High-Yield Fact**
Remember: **Internal iliac branches → pelvic structures only**. The femoral artery is a **pelvic-to-thigh** vessel and is a **continuation of the external iliac artery**, not a branch of the internal iliac artery.

✓ Correct Answer: C. Femoral artery