Correct Answer: D

Rationale: When palpating the client's neck for lymphadenopathy, the nurse should position herself in front of a sitting client. This positioning allows for easier access to the neck area and better visualization of any swelling or abnormalities in the lymph nodes. Placing oneself in front of the client ensures proper alignment and comfort for both the nurse and the client during the assessment. Choices A, B, and C are incorrect as positioning at the back or sides of the client may hinder proper assessment due to limited visibility and access to the neck area.

Correct Answer: A

Rationale: The correct answer is A: Second intercostal space, right sternal border. The aortic valve is best auscultated at the second intercostal space, right sternal border, where the murmur of aortic stenosis is heard most clearly. Choices B, C, and D are incorrect as they are not the recommended anatomical positions for auscultating the murmur of aortic stenosis.

Correct Answer: A

Rationale: Obesity is a primary factor that affects blood pressure. Excess body weight, especially when concentrated around the abdomen, can increase the risk of hypertension (high blood pressure) as it puts extra strain on the heart to pump blood around the body. This can lead to various cardiovascular complications and other health issues. Managing weight through a healthy diet and regular physical activity can help control blood pressure levels. Age, stress, and gender can also influence blood pressure, but obesity has a more direct and significant impact on increasing blood pressure levels compared to the other factors listed.

Correct Answer: A

Rationale: Patients with chronic renal failure should avoid potassium due to impaired kidney function. The kidneys may not effectively filter excess potassium from the blood, leading to hyperkalemia. Calcium, iron, and zinc do not need to be avoided specifically in chronic renal failure unless there are other underlying reasons or complications.

Correct Answer: D

Rationale: The correct answer is D because elevating the head of the bed reduces the risk of aspiration, and warming the formula to room temperature helps prevent discomfort and complications. Choice A is incorrect as only licensed healthcare professionals should aspirate and measure the amount of gastric aspirate. Choice B is correct as it helps prevent aspiration. Choice C is correct as warming the formula can prevent discomfort.