## Core Concept
Tattooing around the entry wound is a forensic finding associated with gunshot injuries. It occurs due to the embedding of unburnt gunpowder particles into the skin. This phenomenon is crucial in differentiating between entry and exit wounds in forensic pathology.

## Why the Correct Answer is Right
The correct answer, **C. Close range**, is right because tattooing or stippling around a wound is characteristic of a gunshot fired at close range, but not so close that the gunpowder is completely burned or dispersed away from the skin. When a gun is fired at close range, the unburnt gunpowder particles can embed themselves into the skin around the entry wound, creating a stippled or tattooed appearance.

## Why Each Wrong Option is Incorrect
- **Option A: Medium velocity injury** - This option does not directly relate to the mechanism of tattooing. The velocity of the injury (or bullet) does not directly determine the presence of tattooing; rather, it's the distance between the gun and the skin that matters.
- **Option B: Abrasive injury** - Abrasive injuries are related to friction and scraping of the skin against a surface, which does not involve the embedding of particles like gunpowder and thus does not cause tattooing.
- **Option D: Exit wound** - Tattooing is typically associated with entry wounds. Exit wounds do not usually exhibit tattooing because the bullet has already exited the body, and the forces at play do not facilitate the embedding of gunpowder particles into the skin.

## Clinical Pearl / High-Yield Fact
A key point to remember is that the presence of tattooing indicates an entry wound and suggests that the firearm was discharged at close range but not in direct contact with the skin. This forensic clue is essential for reconstructing gunshot injuries.

## Correct Answer: C. Close range.