Correct Answer: B

Rationale: A heart rate of 120 beats per minute is within the normal range for a 2-month-old infant. Therefore, it is safe to administer the digoxin and document the heart rate as part of routine care. Choice A is incorrect as withholding the medication is not necessary since the heart rate is normal. Choice C is incorrect as there is no need to delay the administration until the next scheduled dose when the heart rate is within the normal range. Choice D is incorrect as the primary nurse is not needed to administer the medication since the heart rate is normal and falls within the safe range for administration.

Correct Answer: B

Rationale: Lung cancer is the leading cause of cancer-related deaths in women, surpassing even breast cancer. While breast cancer is more common, it is often detected early enough for effective treatment. Lung cancer, on the other hand, tends to be diagnosed at later stages, leading to higher mortality rates. Brain cancer and colon and rectal cancer are not the leading causes of cancer-related deaths in women, making them incorrect choices.

Correct Answer: A

Rationale: The olfactory nerve (Cranial Nerve I) is indeed responsible for the sense of smell. It is located in the nasal cavity and transmits olfactory information to the brain. The optic nerve (Choice B) is responsible for vision, the trigeminal nerve (Choice C) is responsible for sensation in the face, and the vagus nerve (Choice D) is responsible for various functions such as heart rate, digestion, and speech. Therefore, the correct answer is the olfactory nerve (Choice A).

Correct Answer: D

Rationale: The correct intervention for a client in active labor complaining of a leg cramp is to extend the leg and flex the foot. This action helps stretch the muscles that are cramping, providing relief. Massaging the calf and foot (Choice A) may not be as effective for relieving the cramp. Elevating the leg above the heart (Choice B) is not indicated for a leg cramp. Checking the pedal pulse in the affected leg (Choice C) is unrelated to addressing the leg cramp.

Correct Answer: B

Rationale: Checking the pH of the aspirate is the most reliable method to confirm nasogastric tube placement as it provides direct evidence of the tube's location in the stomach. When the pH is acidic (pH < 5), it indicates that the tube is correctly placed in the stomach. Auscultating over the stomach while injecting air may not always be accurate, as the sound can be misleading due to various factors. Observing the patient's response during feeding is not a definitive method for confirming tube placement, as it can be influenced by other factors. Measuring the external length of the tube does not ensure correct placement within the GI tract and can be affected by external factors like patient anatomy.