Correct Answer: A

Rationale: The correct answer is to use the defrost setting on microwave ovens to warm bottles. It is essential for parents to be cautious when warming bottles in a microwave oven to prevent superheating of the milk. Choosing the defrost setting and checking the formula temperature before giving it to the baby helps avoid burns. Discarding partially used bottles after 24 hours when refrigerating formula is crucial as it reduces the risk of harmful bacterial growth. Mixing formula concentrate with water in a 1:1 ratio of one part concentrate to one part water ensures proper dilution of the formula. On the other hand, powdered formula should be mixed following the package instructions, typically using two parts water to one part powder. This accurate mixing ratio provides the necessary balance of nutrients for the baby. Adding fresh formula to partially used bottles can introduce pathogens that may harm the infant, underscoring the importance of discarding partially used bottles and preparing formula correctly. Therefore, options B, C, and D are incorrect as they do not address the safe and proper ways to feed a newborn effectively.

Correct Answer: B

Rationale: The correct answer is 'eggs.' Eggs are considered a complete protein as they contain all nine essential amino acids required by the body. On the other hand, corn, peanuts, and sunflower seeds are incomplete proteins, meaning they lack one or more of the essential amino acids needed by the body for optimal health. Corn, peanuts, and sunflower seeds are plant-based proteins that are deficient in one or more essential amino acids, unlike eggs, which are a high-quality complete protein source.

Correct Answer: B

Rationale: The correct answer is 'headache.' While vancomycin can cause ototoxicity leading to symptoms like tinnitus, vertigo, and nausea, headaches are not typically associated with vancomycin use. Therefore, headache is the least concerning symptom in this scenario. Nausea, vertigo, and tinnitus are more likely to be related to vancomycin ototoxicity and should be closely monitored and reported. Headache is a common symptom that may not be directly linked to vancomycin use.

Correct Answer: D

Rationale: When obtaining a health history on a menopausal woman, unexplained vaginal bleeding should be recognized as a contraindication for hormone replacement therapy. This is because it can be a sign of underlying issues that need to be addressed before starting hormone therapy. A family history of stroke is not a contraindication for hormone replacement therapy unless the woman herself has a history of stroke or blood-clotting events. Ovaries removed before age 45 is not a contraindication for hormone replacement therapy. Frequent hot flashes and/or night sweats can be relieved by hormone replacement therapy; therefore, they are not contraindications.

Correct Answer: D

Rationale: The correct answer is 'all of the above.' According to the ANA Code of Ethics for Nurses, professional nurses have ethical obligations to patients (clients), the nursing profession, and providing high-quality care. These elements are fundamental principles outlined in the code of ethics to guide nurses in their practice. Choice A is correct as nurses prioritize the well-being and care of their patients. Choice B is correct as nurses are expected to uphold the values and integrity of the nursing profession. Choice C is correct as providing high-quality care is a core ethical obligation of nurses. Therefore, all the choices align with the ANA Code of Ethics for Nurses.