Correct Answer: A

Rationale: The correct answer is A: '2'. Gastric contents with a pH between 0 and 4 provide a good indication of appropriate tube placement. A pH of 2 is within this range, indicating that the tube is correctly placed in the stomach. Choices B, C, and D are incorrect because a pH of 5, 7, or 9 does not fall within the expected acidic pH range of gastric fluid.

Correct Answer: A

Rationale: The correct answer is A: Liver function tests. Atorvastatin, a medication commonly used to lower cholesterol levels, can potentially cause liver damage as a side effect. Monitoring liver function tests is essential to detect any abnormalities early. Choices B, C, and D are incorrect because atorvastatin is not known to directly impact potassium levels, blood glucose levels, or serum calcium levels. While these parameters may be monitored for other reasons, the priority when administering atorvastatin is to monitor liver function due to the risk of hepatotoxicity.

Correct Answer: A

Rationale: Corrected Rationale: Metoprolol is a beta-blocker commonly used to treat conditions like hypertension and angina. As a beta-blocker, it primarily affects the cardiovascular system by reducing heart rate and blood pressure. Therefore, the nurse should monitor the client's blood pressure regularly to assess the drug's effectiveness and ensure that it is within the therapeutic range. Monitoring liver function, serum potassium levels, or blood glucose is not typically required for clients taking metoprolol, as its primary impact is on the heart and blood vessels, making choice A the most appropriate monitoring parameter.

Correct Answer: C

Rationale: The correct information to include when teaching a client about pantoprazole is that it can cause headaches. Option A is incorrect because pantoprazole is usually taken before meals. Option B is not necessary information for the client to know. Option D is not directly related to the side effects of pantoprazole.

Correct Answer: A

Rationale: Increased thirst is a classic symptom of hyperglycemia due to the body trying to eliminate excess glucose through urine, leading to dehydration and increased thirst. Weight gain, decreased urination, and fatigue are not typical signs of hyperglycemia. Weight gain is more commonly associated with conditions like hypothyroidism or fluid retention. Decreased urination is not a typical symptom of hyperglycemia, as high blood sugar levels usually lead to increased urination. Fatigue can be a symptom of hyperglycemia, but it is not as specific or characteristic as increased thirst.