Final answer:
The best possible Glasgow Coma score for a patient who is intubated and cannot talk is 3 (option A).
Step-by-step explanation:
The best possible Glasgow Coma score for a patient who is intubated and cannot talk is 3 (option A). The Glasgow Coma Scale (GCS) is a neurological scale used to assess a patient's level of consciousness, with scores ranging from 3 to 15. A score of 3 indicates that the patient is in a deep coma with no motor or verbal response. Since the patient is intubated and unable to communicate verbally, they would not be able to achieve a higher score on the GCS.