**Question:** Glasgow coma scale of a patient with head injury who is confused, able to localize on the right side and does flexion on the left side and opens eye for painful stimuli on sternum.

**Core Concept:** Glasgow Coma Scale (GCS) is a clinical assessment tool to evaluate a patient's level of consciousness following a head injury. The scale comprises three components: eye, verbal, and motor responses. Each component is scored from 1 to 6, with lower scores indicating poorer neurological function.

**Why the Correct Answer is Right:** In this scenario, the patient demonstrates the following responses:
1. Eye response: Opens eye to sternal pain (score of 4).
2. Verbal response: Confused (score of 3).
3. Motor response: Flexes on left side and localizes to the right side (scores of 3 and 4 respectively).

The patient's total GCS score is calculated as follows: (4 + 3 + 4) = 11.

**Why Each Wrong Option is Incorrect:**
1. Option A: The patient's eye response to sternal pain is incorrectly scored as 2. Opening the eye to pain is a good response, hence a score of 4.
2. Option B: The patient's verbal response is scored as 2 instead of 3 because they are confused. A confused state would result in a lower score (3 in this case).
3. Option C: The patient's motor response is scored as 1 instead of 4 as they localize to the right side, which is a better response than flexion.
4. Option D: The patient's verbal response is scored as 2 instead of 3 as they are not in a vegetative state but are confused. A vegetative state would result in a score of 3 or less.

**Clinical Pearl:** The Glasgow Coma Scale is a widely used tool for assessing a patient's neurological status after a head injury. It provides a quick and standardized method for evaluating a patient's level of consciousness and helps guide treatment decisions, prognosis, and clinical management.