Correct Answer: C

Rationale: The correct answer is C, 'Mobilization.' Mobilization is the fourth major function of the Army Medical Department. This involves preparing and organizing medical resources and personnel for deployment during military operations. Choices A, B, and D are incorrect because while they are important aspects in military healthcare, they do not represent the fourth major function of the Army Medical Department as specifically requested in the question.

Correct Answer: D

Rationale: The correct answer is D, St. John's Wort. St. John's Wort can interact with antidepressants and oral contraceptives, potentially reducing their efficacy. Iron supplement, garlic, and green tea are not typically known to have significant interactions with antidepressants or oral contraceptives, making them less likely to impact the client's treatment.

Correct Answer: A

Rationale: The correct answer is A. Accountability in personnel management involves being answerable for one's actions and decisions, which includes listening to and addressing the suggestions and complaints of soldiers. This category focuses on the responsibility and answerability aspect of the nurse manager's role. Choices B, C, and D are incorrect because personal/professional development is about growth and improvement, individual training pertains to specific skill development, and military appearance/physical condition relates to the physical presentation and fitness levels, none of which directly address the task of listening and responding to soldiers' suggestions and complaints.

Correct Answer: B

Rationale: Clients who smoke require more vitamin C due to increased oxidative stress and depletion of vitamin C. Smoking leads to the generation of free radicals in the body, causing oxidative stress and consuming higher levels of antioxidants like vitamin C. Choices A, C, and D are incorrect as they do not directly relate to the increased need for vitamin C as seen in smokers.

Correct Answer: D

Rationale: The correct answer is D, Erythropoietin deficiency anemia. Chronic kidney disease often leads to anemia due to decreased production of erythropoietin. This hormone, produced by the kidneys, stimulates the bone marrow to produce red blood cells. Choices A, B, and C are incorrect. Iron-deficiency anemia is characterized by low iron levels, vitamin B12 deficiency anemia by inadequate vitamin B12, and aplastic anemia by bone marrow failure.