## **Core Concept**
The Glasgow Coma Scale (GCS) is a neurological scale intended to give a reliable, objective way of recording the conscious state of a person for initial as well as subsequent assessment. A patient who is dead would have a GCS score that reflects no brain activity.

## **Why the Correct Answer is Right**
The GCS score ranges from 3 to 15, with higher scores indicating better neurological function. A score of 3 indicates deep unconsciousness or death, as it reflects no eye opening (1 point), no verbal response (1 point), and no motor response (1 point). Therefore, a dead patient would have a GCS score of 3.

## **Why Each Wrong Option is Incorrect**
- **Option A:** A GCS score of 15 indicates full neurological function, which is not applicable to a dead patient.
- **Option B:** A GCS score of 14 or 13 would indicate some level of neurological function, which does not align with a patient being dead.
- **Option D:** A GCS score of 4 or any higher number does not accurately reflect a lack of neurological function as seen in death.

## **Clinical Pearl / High-Yield Fact**
A key point to remember is that a GCS score of 3 is often associated with a very poor prognosis, and in the context of this question, it is the score given to a dead patient. Clinicians use the GCS to quickly assess the level of consciousness in patients, which is critical for determining the severity of brain injury.

## **Correct Answer:** . 3.