Correct Answer: C

Rationale: The correct answer is C: Fine needle aspiration. This procedure involves inserting a thin needle into the lump to extract cells for examination. It provides a definitive diagnosis of breast cancer by analyzing the cells for cancerous features. Breast self-examination (A) is a screening tool but cannot confirm a diagnosis. Mammography (B) is used for screening and detecting abnormalities but also requires further testing for diagnosis. Chest x-ray (D) is not used to diagnose breast cancer.

Correct Answer: C

Rationale: Rationale for Choice C (Correct Answer): 1. Multiple sclerosis (MS) commonly affects the optic nerve and chiasm. 2. MS is characterized by demyelination of nerves, leading to visual disturbances. 3. Optic nerve involvement results in vision problems, such as blurred vision. 4. Chiasm involvement can cause visual field deficits and color perception changes. Summary of Other Choices: A: Lateral, 3rd, and 4th ventricles - Incorrect. MS primarily affects the central nervous system, not ventricles. B: Pons, medulla, and cerebral peduncles - Incorrect. While these areas are part of the brainstem, they are not commonly affected in MS. D: Above areas - Incorrect. This choice is vague and does not specify any specific areas affected by MS.

Correct Answer: B

Rationale: The correct answer is B. Mr. Sy's statement indicates he understands the pre-operative fasting instructions, which is crucial to prevent aspiration during surgery. Not eating after midnight reduces the risk of complications. A: Incorrect. Wearing a pneumatic compression device post-surgery is important, but this statement does not demonstrate understanding of pre-surgery preparations. C: Incorrect. Knowing the skin preparation site size does not indicate understanding of the surgery process. D: Incorrect. Signing the consent form at the operating table may indicate lack of understanding of the consent process and timing. In summary, choice B is correct as it shows Mr. Sy's awareness of the fasting requirement before surgery, which is crucial for a safe operation.

Correct Answer: C

Rationale: Rationale: C: Monitoring body temperature is essential for early detection of infection or fever, which can indicate disease exacerbation in SLE clients. A: Exposure to sunlight can worsen SLE symptoms due to photosensitivity. B: Activity limitations are crucial to prevent flare-ups and reduce disease progression in SLE. D: Corticosteroids should not be stopped abruptly without healthcare provider guidance to prevent symptom recurrence and adrenal insufficiency.

Correct Answer: D

Rationale: The correct answer is D: Heart. A potassium level of 6.3 mEq/L indicates hyperkalemia, which can lead to cardiac arrhythmias and even cardiac arrest. The heart is highly sensitive to potassium levels, as it plays a crucial role in regulating the heart's electrical activity. Elevated potassium levels can disrupt this balance, leading to serious cardiac complications. Summary: A: Lungs - Not directly affected by potassium levels. B: Liver - Not directly affected by potassium levels. C: Kidneys - Kidneys regulate potassium levels but are not the most at risk for dysfunction in this scenario.