Correct Answer: B

Rationale: The correct answer is B: Tachycardia. Tachycardia can indicate a hemolytic transfusion reaction, a severe and life-threatening complication of blood transfusion. The nurse should report tachycardia immediately to prevent further complications. Low back pain, flushed skin, and headache are also important to monitor during a blood transfusion, but they are not as indicative of a severe transfusion reaction as tachycardia.

Correct Answer: A

Rationale: When assessing for infection in a patient post-surgery, checking the surgical site is crucial. Changes in the appearance of the surgical site, such as redness, swelling, warmth, or drainage, can indicate an infection. While checking for fever (Choice B) is also important as it can be a sign of infection, it is a more general symptom and may not always be present. Checking for abnormal breath sounds (Choice C) and skin color (Choice D) are not typically direct indicators of infection in a post-surgery patient.

Correct Answer: B

Rationale: The correct answer is B because the client should drink a sugar solution for a glucose challenge test, which is part of the nonstress test protocol during pregnancy. Choice A is incorrect because adequate hydration is generally recommended before the test. Choice C is incorrect as the nonstress test monitors the baby's heart rate in response to its own movements, not contractions. Choice D is incorrect as the nonstress test does not assess fetal lung maturity.

Correct Answer: B

Rationale: The correct instruction for a client prescribed levothyroxine is to take the medication at the same time every day. This consistency is important for maintaining stable thyroid hormone levels. Choice A is incorrect because levothyroxine should be taken on an empty stomach to ensure proper absorption. Choice C is important but not directly related to the administration of levothyroxine. Choice D is incorrect as antacids can interfere with the absorption of levothyroxine.

Correct Answer: B

Rationale: The best position for a patient experiencing shortness of breath is the Semi-Fowler's position. This position promotes lung expansion and improves oxygenation by allowing the chest to expand more fully. The Supine position (lying flat on the back) may worsen breathing difficulties by reducing lung capacity. The Trendelenburg position (feet elevated higher than the head) is not recommended for patients with shortness of breath as it can increase pressure on the diaphragm and compromise breathing. The Prone position (lying face down) is also not suitable for patients experiencing shortness of breath as it may further restrict breathing.