**Core Concept**
The nerve supply to the face, including the nose, is provided by the trigeminal nerve (**cranial nerve V**), which has three main divisions: ophthalmic, maxillary, and mandibular. The **ophthalmic division** is responsible for the sensory innervation of the nose.

**Why the Correct Answer is Right**
The **external nasal nerve**, a branch of the **anterior ethmoidal nerve**, which in turn is a branch of the **nasociliary nerve** (part of the ophthalmic division of the trigeminal nerve), supplies the tip of the nose. This specific nerve pathway is crucial for the sensation of the nasal tip.

**Why Each Wrong Option is Incorrect**
**Option A:** This choice is incorrect because it does not specifically relate to the nerve supply of the nose's tip.
**Option B:** Incorrect, as this does not pertain to the nasal tip's innervation.
**Option C:** This is not accurate for the tip of the nose.
**Option D:** Incorrect, as it is not the nerve responsible for the sensation at the tip of the nose.

**Clinical Pearl / High-Yield Fact**
Remembering the **cranial nerve V** divisions and their branches is key for understanding facial sensory innervation. The **ophthalmic division** is particularly important for the nose and eye regions.

**Correct Answer: D. External Nasal Nerve**