Correct Answer: C

Rationale: The correct answer is C because Neomycin is given preoperatively to decrease and retard the growth of normal bacteria in the intestines. This helps reduce the risk of infection during surgery by minimizing the number of bacteria present in the colon. Options A, B, and D are incorrect because Neomycin is not given to prevent infection postoperatively, eliminate the need for preoperative enemas, or treat cancer of the colon. The main purpose of administering Neomycin in this scenario is to create a sterile surgical field by reducing the normal flora in the intestines.

Correct Answer: B

Rationale: The correct answer is B: 45-year old woman who has never been pregnant. This client has the highest risk of ovarian cancer due to nulliparity, which is a known risk factor. Women who have never been pregnant have a higher risk of developing ovarian cancer compared to those who have had children. Other choices are incorrect because contraceptives actually reduce the risk of ovarian cancer, having children can slightly decrease the risk, and having a child at a young age does not increase the risk significantly.

Correct Answer: D

Rationale: Step 1: The correct answer is D because it emphasizes the importance of medical examination and diagnostic testing to determine if the man has an STD. Step 2: Visual inspection (choice B) is not reliable as some STDs may not present with visible symptoms. Step 3: Relying solely on appearance and condom use (choices A and C) does not guarantee protection against all STDs. Step 4: Choice D is the best option as it advocates for seeking professional medical advice for accurate diagnosis and treatment.

Correct Answer: B

Rationale: The correct answer is B: Stage 2 hypertension. The patient's BP readings consistently fall within the range of 160-179 systolic or 100-109 diastolic, which aligns with the criteria for Stage 2 hypertension based on the current guidelines. This classification indicates a higher level of hypertension that requires prompt medical attention and intervention to reduce the risk of complications. Choices A, C, and D are incorrect because they do not correspond to the BP readings provided, falling outside the range for prehypertension, Stage 1 hypertension, and posthypertension.

Correct Answer: A

Rationale: The correct answer is A: 2 L/min. In emphysema, there is impaired gas exchange due to damaged lung tissue, resulting in decreased oxygen levels. Administering too high a flow rate can lead to oxygen toxicity. The standard oxygen therapy for emphysema is 1-2 L/min to maintain oxygen saturation without causing harm. Higher flow rates like 10 L/min (B) and 6 L/min (C) are excessive and can lead to oxygen toxicity. 95 L/min (D) is dangerously high and not suitable for oxygen therapy in emphysema. Therefore, A is the correct choice for safe and effective oxygen administration in emphysema.