Answer:
b) Uric acid level
Step-by-step explanation:The nurse should monitor the uric acid level to determine the effectiveness of allopurinol. Allopurinol is a medication commonly used to treat conditions like gout by reducing the production of uric acid in the body. Monitoring the uric acid level helps assess whether the medication is effectively lowering uric acid levels in the blood, which is the primary goal of treatment.