**Question:** All are features of entrance wound by a bullet except

A. Inflammatory response
B. Haemorrhage
C. Contusion
D. Fracture

**Correct Answer:** C. Contusion

**Core Concept:**
A bullet wound is a type of injury caused by a projectile moving at high speed, such as those produced by firearms. When a bullet enters the body, it can cause various injuries depending on factors like the size, speed, and path of the projectile. Entrance wounds are typically characterized by specific features related to the mechanical impact of the projectile and the body's response to the injury.

**Why the Correct Answer is Right:**
An entrance wound is primarily caused by the physical impact of the bullet. The correct answer, Contusion (Option C), refers to an external injury characterized by localised cell death due to compression and shearing forces. In contrast, contusions occur at the exit wound, not the entrance wound. Entrance wounds are primarily characterized by mechanical damage caused by the bullet, such as haemorrhage (Option B) and fracture (Option D). Inflammatory response (Option A) is more commonly associated with exit wounds, as it involves the body's response to the foreign body (bullet) entering the body.

**Why Each Wrong Option is Incorrect:**

A. Haemorrhage (Option B) is a feature of entrance wounds due to the disruption of blood vessels caused by the high-velocity impact of the bullet. The body's response to injury involves blood loss, and entrance wounds are no exception.

B. Fracture (Option D) is also a feature of entrance wounds, particularly when the bullet travels through bones. The high-velocity impact of the bullet can cause fractures, which are not related to contusions.

C. Contusions (Option C) are associated with exit wounds, not entrance wounds. Entrance wounds are characterized by the physical trauma caused by the bullet entering the body. Contusions result from the body's response to injury, which is more commonly observed at the exit wound.

**Clinical Pearl:**

A contusion is a type of injury caused by the compression and shearing forces exerted on tissues during a blunt force trauma. In the context of bullet wounds, contusions are more commonly observed at the exit wound. Entrance wounds, on the other hand, are caused by the physical trauma resulting from the bullet entering the body. Understanding the differences between entrance and exit wounds is crucial for accurate diagnosis and treatment planning in forensic medicine and clinical practice.