**Core Concept**
A coup injury is a type of brain injury that occurs as a direct result of a force applied to the head, typically at the site of impact. This type of injury is characterized by damage to the brain tissue at the point of impact, often accompanied by damage to the underlying skull. The coup injury is usually accompanied by a contracoup injury, which occurs on the opposite side of the brain due to the rebound effect of the initial impact.

**Why the Correct Answer is Right**
Option C states that a coup injury is more severe than a contracoup injury. However, this is incorrect because a coup injury is typically less severe than a contracoup injury. The reason for this is that the coup injury occurs at the site of the initial impact, whereas the contracoup injury occurs due to the rebound effect of the initial impact, often resulting in more extensive damage to the brain tissue.

**Why Each Wrong Option is Incorrect**
**Option A:** A coup injury can occur at the site of impact, but it is not the only possible location. The injury can also occur at a distance from the site of impact due to the transmission of force through the skull and brain tissue.
**Option B:** Coup injuries can occur when the head is moving or fixed, as the force of the impact is what determines the type of injury.
**Option D:** External injuries such as contusions, lacerations, and skull fractures are often associated with coup injuries, as they can provide a visible indication of the force applied to the head.

**Clinical Pearl / High-Yield Fact**
It is essential to remember that coup injuries are often accompanied by contracoup injuries, and the severity of the contracoup injury can be more significant than the coup injury.

✓ Correct Answer: C. Severe than cotre- couple injury