Pinna is supplied by:
**Core Concept**
The **pinna**, also known as the auricle, is the visible part of the ear that collects sound waves. Its blood supply is derived from branches of the **external carotid artery**. The **great auricular nerve** and **auriculotemporal nerve** provide sensory innervation.
**Why the Correct Answer is Right**
The great auricular nerve, a branch of the **cervical plexus**, supplies the skin over the parotid gland and the anterior and posterior surfaces of the pinna. The auriculotemporal nerve, a branch of the **mandibular division of the trigeminal nerve**, provides sensory innervation to the anterior surface of the pinna and the external auditory meatus.
**Why Each Wrong Option is Incorrect**
**Option A:** Incorrect because it is not the primary nerve responsible for the sensory innervation of the pinna.
**Option B:** Incorrect as it does not specifically relate to the pinna's sensory supply.
**Option C:** Incorrect because, although the great auricular nerve is involved, this option does not fully address the question.
**Why Each Wrong Option is Incorrect**
**Option D:** This option might seem plausible but is incorrect because the question asks for the nerve supply, not just any supply.
**Clinical Pearl / High-Yield Fact**
The **great auricular nerve** is often encountered in surgical procedures involving the parotid gland and is at risk of injury. Remembering its course and relation to the pinna is crucial for surgeons.
**Correct Answer:** Correct Answer: D. Great auricular nerve and auriculotemporal nerve.