Correct Answer: B

Rationale: The correct answer is B: Dyspnea. Dyspnea is a common sign of organ rejection after heart transplantation, indicating possible heart failure. Low white blood cell count (A) is not typically a direct sign of organ rejection. ECG changes (C) may occur but are not specific to organ rejection. Fever (D) is a non-specific symptom and can be caused by various factors. Dyspnea is a key indicator that the transplanted heart is not functioning properly and should be closely monitored.

Correct Answer: A

Rationale: The correct answer is A because during the first phase of the nursing process (assessment), the nurse gathers a comprehensive database of information about the patient's health status. This includes collecting subjective and objective data to form a baseline for further decision-making. Identifying nursing diagnoses (B) occurs in the second phase (diagnosis), intervening based on priorities of patient care (C) is part of the third phase (planning), and determining outcomes (D) is done in the final phase (evaluation). Therefore, completing a comprehensive database is the most appropriate action in the first phase.

Correct Answer: B

Rationale: The correct answer is B: a semi-private room. For a burn patient like Mr. Boy, a semi-private room is preferred to provide a more controlled environment for infection prevention, wound care, and privacy. Strict isolation (A) is not necessary as his burns are not infectious. Liberal visiting (C) can increase the risk of infection and compromise his recovery. Sharing equipment (D) can lead to cross-contamination and is not recommended for burn patients. In summary, a semi-private room balances infection control and patient comfort for burn patients.

Correct Answer: C

Rationale: The correct answer is C: Helper T cells. Helper T cells play a crucial role in activating B cells by releasing cytokines that stimulate B cell proliferation and differentiation. They also help in the production of antibodies. Cytotoxic T cells (A) are involved in cell-mediated immunity, not humoral immunity. Suppressor T cells (B) regulate the immune response and do not directly assist in B cell activation. Neutrophils (D) are phagocytic cells involved in innate immunity, not in activating B cells in humoral immunity.

Correct Answer: B

Rationale: The correct answer is B because it acknowledges the patient's behavior is likely due to the stroke affecting his inhibitions. Finding a male assistant respects both the patient's dignity and the nursing assistant's comfort. Choice A is inappropriate as physical violence is never an acceptable response. Choice C lacks empathy and understanding of the situation. Choice D minimizes the seriousness of the behavior and fails to address the issue. B is the best option for promoting a safe and respectful environment for both the patient and staff.