Correct Answer: A

Rationale: The correct action for the nurse to take is to gently shake the container of liquid medication before administration. Shaking the container ensures proper mixing of the medication, which is important to maintain uniformity of the dose. Transferring the medication to a medicine cup (choice B) may not be necessary for a small volume like 0.5 mL. Placing the client in a semi-Fowler's position (choice C) is not directly related to administering liquid medication orally. Verifying the dosage by measuring the liquid (choice D) is important but does not address the specific action needed to prepare the medication for administration.

Correct Answer: A

Rationale: An elevated white blood cell count (WBC 15,000/mm³) is a common indicator of infection as the body increases WBC production to fight off pathogens. In conditions like infections, inflammation, or stress, the WBC count can rise. The other options, hemoglobin, platelet count, and sodium levels, are not typically specific indicators of infection. Hemoglobin measures the oxygen-carrying capacity of red blood cells, platelet count assesses clotting ability, and sodium levels indicate electrolyte balance.

Correct Answer: B

Rationale: The correct answer is B, Hypoglycemia. In diabetes mellitus, hypoglycemia can lead to symptoms such as anxiety, shakiness, and weakness due to low blood sugar levels. Hyperglycemia (choice A) is high blood sugar levels and typically presents with symptoms like increased thirst and frequent urination. Ketoacidosis (choice C) is a serious complication of diabetes characterized by high levels of ketones in the blood, leading to symptoms such as fruity breath and rapid breathing. The Dawn phenomenon (choice D) refers to an abnormal early-morning increase in blood sugar levels without an associated hypoglycemia during the night.

Correct Answer: C

Rationale: The correct answer is 'C: Sore throat.' Oxygen toxicity can manifest with symptoms like a sore throat, cough, chest pain, difficulty breathing, and fatigue. However, a sore throat can be an early indicator of oxygen toxicity and should prompt immediate attention. Nasal congestion, cough, and fatigue are not specific indicators of oxygen toxicity but could be related to other factors in a client with COPD receiving oxygen therapy.

Correct Answer: C

Rationale: To calculate the dosage correctly, the weight in pounds must first be converted to kilograms. 220 lb / 2.2 = 100 kg. Then, multiply the weight in kg by the dosage of 2 mg/kg: 2 mg/kg 100 kg = 200 mg. Therefore, the correct dosage to administer is 200 mg, which is closest to option A. Option C (160 mg) is incorrect because it does not match the calculated dosage. Options B (100 mg) and D (180 mg) are also incorrect as they do not align with the correct calculation.