All of the following are signs and symptoms of a brain injury except:

Signs and symptoms of a brain injury can manifest in various forms, primarily affecting the patient's neurological function. Bleeding or fluid from the ears, loss of consciousness, and pupils that are unequal, slow, or non-reactive to light are all indicators that suggest a potential head injury or intracranial pathology.

When examining the options, bleeding or fluid from the ears typically indicates basilar skull fracture or other significant head trauma, pointing directly to a brain injury. Loss of consciousness can indicate severity in head injury, suggesting that the brain is affected. Unequal, slow, or non-reactive pupils can reflect increased intracranial pressure or brain herniation, both of which are serious complications resulting from brain injuries.

In contrast, chest pain does not correlate with signs and symptoms specifically associated with brain injuries. While chest pain necessitates medical attention and can indicate various conditions such as cardiac or respiratory issues, it does not present as a symptom related to dysfunction of brain activity or structure. This distinction makes it clear that chest pain is unrelated to brain injuries, leading to its identification as the correct answer in this context.