Cailage of which of the following pharyngeal arch is known as Reiche’s cailage?
**Core Concept**
Reiche's cartilage is a component of the embryological development of the human pharyngeal arches, specifically related to the formation of the hyoid bone and the laryngeal cartilages. This cartilage is a key structure in the development of the upper respiratory tract and is essential for understanding the embryological origins of the larynx and hyoid apparatus.
**Why the Correct Answer is Right**
Reiche's cartilage is a cartilaginous structure that develops from the second pharyngeal arch and is involved in the formation of the greater horn and the upper part of the body of the hyoid bone. It is a critical component of the embryological development of the laryngeal cartilages and plays a key role in the formation of the laryngeal prominence. The second pharyngeal arch, also known as the hyoid arch, gives rise to the stapes bone, the styloid process, and the lesser horn of the hyoid bone, as well as the greater horn and upper body of the hyoid bone through the development of Reiche's cartilage.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because Reiche's cartilage is not associated with the first pharyngeal arch, which is primarily involved in the development of the jaw and the anterior part of the hyoid bone.
* **Option B:** This option is incorrect because Reiche's cartilage is not associated with the third pharyngeal arch, which is primarily involved in the development of the common carotid artery and the internal carotid artery.
* **Option D:** This option is incorrect because Reiche's cartilage is not associated with the fourth pharyngeal arch, which is primarily involved in the development of the aortic arch and the pulmonary artery.
**Clinical Pearl / High-Yield Fact**
Reiche's cartilage is a key structure in the embryological development of the larynx and hyoid apparatus, and its development is critical for the formation of the laryngeal prominence and the upper respiratory tract. Understanding the embryological origins of the larynx and hyoid apparatus is essential for diagnosing and treating congenital anomalies of the larynx and upper respiratory tract.
**Correct Answer:** C.