Final answer:
The symptom that requires immediate attention is hydration status. Decreased urine output can be an indicator of poor hydration, which can lead to various complications.
Step-by-step explanation:
When reviewing a client admitted to med surg with incisional pain, restless behavior, and decreased urine output, the symptom that requires immediate attention is b) Hydration status. This is because decreased urine output can be an indicator of poor hydration, which can lead to various complications. Additionally, proper hydration is essential for the healing process and overall patient well-being.
In this case, the patient's restless behavior and incisional pain can be addressed once the hydration status is evaluated and managed appropriately.