Pinna develops from
**Core Concept**
The development of the **pinna** (or auricle) is a complex process involving the formation of multiple hillocks. These hillocks are derived from the **first** and **second pharyngeal arches**. The pinna's development is closely related to the formation of the external ear.
**Why the Correct Answer is Right**
The correct answer is related to the embryological development of the pinna, which arises from six hillocks of His, three from the first pharyngeal arch and three from the second pharyngeal arch. These hillocks fuse and develop into the pinna. The **first pharyngeal arch** contributes to the formation of the **tragus** and **helix**, while the **second pharyngeal arch** contributes to the formation of the **antihelix** and **lobule**.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not accurately describe the embryological origin of the pinna.
**Option B:** This option is also incorrect as it does not correctly represent the pharyngeal arches involved in pinna development.
**Option D:** Similarly, this option is incorrect as it does not accurately describe the development of the pinna.
**Clinical Pearl / High-Yield Fact**
The development of the pinna is closely related to the formation of the external ear and the **temporomandibular joint**. Abnormalities in the development of the pinna can be associated with **congenital syndromes**.
**Correct Answer:** C. first and second pharyngeal arches