Correct Answer: B

Rationale: The correct answer is B: 17 drops per minute. To calculate the correct drip rate, you need to use the formula: (Volume to be infused in mL / Time in minutes) x Drop factor. In this case, if the volume to be infused is 100 mL and the time is 60 minutes with a drop factor of 20, the calculation would be: (100 / 60) x 20 = 33.33 drops per minute. Since we cannot deliver fractional drops, the closest whole number is 17 drops per minute. This ensures the correct delivery rate for the medication. Choice A (6 drops per minute) is incorrect as it would be too slow and may not deliver the medication effectively. Choice C (50 drops per minute) and Choice D (100 drops per minute) are incorrect as they would both deliver the medication too quickly, potentially causing harm to the patient. The correct answer, 17 drops per minute, ensures a safe and accurate delivery rate

Correct Answer: D

Rationale: The correct answer is D: pain in the scapular region. This is because a herniated nucleus pulposus at the C4-C5 and C5-C6 interspaces typically results in pain radiating from the neck to the scapular region due to nerve compression at those levels. The other choices are incorrect as constant, throbbing headaches are not typically associated with this specific diagnosis, clonus in the lower extremities is more indicative of lower spinal cord involvement, and numbness of the face is not a common symptom of herniated discs at these levels.

Correct Answer: C

Rationale: The correct answer is C because in Addisonian crisis, the client experiences adrenal insufficiency leading to decreased cortisol levels and impaired stress response. Offering extra blankets and raising room temperature helps prevent hypothermia, as clients in crisis are unable to regulate body temperature. Encouraging independence with ADLs (choice A) and ambulation (choice B) are not priorities as the client is in a critical state. Placing the client in a private room (choice D) is not directly related to managing Addisonian crisis.

Correct Answer: B

Rationale: The correct answer is B. The nurse should explain that zidovudine (AZT) works by blocking reverse transcriptase, the enzyme necessary for HIV replication. This is the key mechanism of action for AZT in managing HIV. Choice A is incorrect because it provides a partial truth - it does slow the disease process but does not provide the mechanism of action. Choice C is incorrect as it provides incorrect information that there are no medications to stop or cure HIV, which is not true. Choice D is incorrect as it provides misleading information about the drug becoming immune to HIV, which is not the primary concern in this context.

Correct Answer: D

Rationale: The correct answer is D, decreased body temperature and cold intolerance, because these are classic signs of hypothyroidism due to decreased thyroid hormone levels. The body's metabolism slows down, leading to a lower core body temperature and reduced ability to tolerate cold. Exophthalmos and conjunctival redness (choice A) are associated with hyperthyroidism. Flushed, warm, moist skin (choice B) is indicative of hyperthyroidism as well, due to increased metabolic rate. A systolic murmur at the left sternal border (choice C) is not a common finding in hypothyroidism.