Correct Answer: A

Rationale: The correct answer is A: Pulmonary embolism. This is the most likely cause of the symptoms based on the presentation of chest pain, dyspnea, hemoptysis, and a mismatched defect on the V/Q scan. A pulmonary embolism occurs when a blood clot travels to the lungs, causing a blockage in the pulmonary artery. This can lead to symptoms like chest pain, shortness of breath, and coughing up blood. The V/Q scan showing a mismatched defect indicates a ventilation-perfusion mismatch, which is a classic finding in pulmonary embolism. Pericarditis (B), acute myocardial infarction (C), and aortic dissection (D) typically present with different sets of symptoms and do not match the V/Q scan findings in this case.

Correct Answer: A

Rationale: The correct answer is A because it includes all the major endocrine glands: pituitary, thyroid, parathyroid, adrenals, pancreatic islets, and hypothalamus. The pituitary gland is known as the "master gland" as it controls other endocrine glands. The thyroid gland regulates metabolism, while the parathyroid glands regulate calcium levels. The adrenal glands produce hormones involved in stress response. Pancreatic islets produce insulin and glucagon. The hypothalamus plays a key role in hormone regulation. Choice B is incorrect because it includes ovaries and testes, which are not endocrine glands. Choice C is incorrect because it omits the hypothalamus. Choice D is incorrect because it includes ovaries and testes which are not endocrine glands.

Correct Answer: D

Rationale: The correct answer is D: advocacy. Advocacy involves actively supporting and promoting the welfare and rights of the patient. Nurses advocate for their patients by ensuring their health, safety, and personal rights are upheld. This ethical principle goes beyond just fulfilling responsibilities or being accountable for one's actions. Responsibility (A) focuses on duties and tasks, accountability (B) is about being answerable for one's actions, and confidentiality (C) pertains to maintaining patient privacy. In this context, advocacy is the most appropriate choice as it encompasses actively working to protect and promote the best interests of the patient.

Correct Answer: A

Rationale: The correct answer is A: Ceftriaxone and azithromycin. Ceftriaxone covers Streptococcus pneumoniae, the most common pathogen in CAP, while azithromycin covers atypical pathogens like Mycoplasma pneumoniae. Vancomycin and piperacillin/tazobactam (choice B) are not first-line treatments for CAP. Ampicillin-sulbactam and levofloxacin (choice C) cover some pathogens but not as comprehensively as ceftriaxone and azithromycin. Clindamycin and cefepime (choice D) do not provide adequate coverage for typical CAP pathogens.

Correct Answer: C

Rationale: The correct answer is C: second. In qualitative research, the nurse researcher typically uses the second person as a reference in the write-up to maintain objectivity and convey findings accurately. Using "first" may introduce bias, "fourth" is irrelevant, and "third" is too far removed from the perspective of the researcher. By referencing the second person, the researcher can present the results in a clear and unbiased manner, enhancing the credibility of the study.