**Core Concept**
Poirier's Triangle is an anatomical region in the neck, bounded by specific structures. It is related to the **thyroid gland** and **trachea**. Understanding its boundaries is crucial for surgical and clinical purposes.

**Why the Correct Answer is Right**
The correct answer is not provided, however, Poirier's Triangle is generally bounded by the **omohyoid muscle**, **sternocleidomastoid muscle**, and the **thyroid cartilage**. These structures form the anatomical landmarks of this triangle.

**Why Each Wrong Option is Incorrect**
**Option A:** Without the correct answer, it's challenging to determine why each option is incorrect.
**Option B:**
**Option C:**
**Option D:**

**Clinical Pearl / High-Yield Fact**
Poirier's Triangle is a significant anatomical landmark, especially during **thyroid surgery**. Knowledge of its boundaries helps surgeons avoid injury to surrounding structures.

**Correct Answer:** Not provided in the question.