Thyroid function tests, serum electrolytes and serum creatinine levels should be monitored for a client who is taking lithium carbonate. This is because lithium can affect the thyroid gland, causing hypothyroidism or goiter. Lithium can also cause dehydration and electrolyte imbalance, which can increase the risk of toxicity. Lithium can also impair renal function, leading to increased serum creatinine levels.

Choice B is wrong because blood glucose levels are not affected by lithium. Choice D is wrong because liver function tests are not indicated for lithium therapy.

Normal ranges for thyroid function tests vary depending on the method and laboratory used, but generally include:

• Thyroid-stimulating hormone (TSH): 0.4 to 4.0 mIU/L

• Free thyroxine (FT4): 0.8 to 2.8 ng/dL

• Total triiodothyronine (T3): 80 to 200 ng/dL

Normal ranges for serum electrolytes include:

• Sodium: 135 to 145 mEq/L

• Potassium: 3.5 to 5.0 mEq/L

• Chloride: 98 to 106 mEq/L

• Bicarbonate: 22 to 26 mEq/L

Normal range for serum creatinine is 0.6 to 1.2 mg/dL for men and 0.5 to 1.1 mg/dL for women.