Correct Answer: A

Rationale: The correct answer is A: Aspirin to prevent further blood clotting. Administering aspirin is crucial in the immediate management of a myocardial infarction as it helps prevent further blood clot formation, which is a key component in the treatment and prevention of myocardial infarction. Oxygen therapy (Choice B) is often provided, but aspirin takes precedence due to its role in reducing clot formation. Intravenous fluids (Choice C) may be needed but are not the immediate priority in this situation. Nitroglycerin (Choice D) is commonly used for chest pain relief in myocardial infarction but is not the first medication to be administered in this scenario.

Correct Answer: D

Rationale: The most crucial aspect of colostomy care to teach the client is to assess the stoma for color and swelling. This is essential to detect early signs of complications such as ischemia or infection. Changing the colostomy bag daily is important but not as critical as assessing the stoma for complications. Irrigating the colostomy daily is not a standard recommendation and should be performed based on healthcare provider's instructions. While avoiding high-fiber foods may be beneficial for some individuals with a colostomy, it is not the most important aspect of care compared to monitoring the stoma for complications.

Correct Answer: C

Rationale: The correct answer is C: Nitroglycerin dilates coronary arteries, improving blood flow to the heart muscle. This helps increase oxygen supply to the heart tissue. Option A, 'Increases heart rate,' is incorrect because nitroglycerin does not directly affect heart rate. Option B, 'Lowers blood pressure,' is also incorrect as while nitroglycerin can lower blood pressure, its primary action in the context of MI is related to coronary artery dilation. Option D, 'Reduces myocardial oxygen demand,' is not the primary action of nitroglycerin in the treatment of myocardial infarction; its main action is to increase oxygen supply by dilating coronary arteries.

Correct Answer: D

Rationale: The priority intervention for a client with type 1 diabetes experiencing symptoms of hypoglycemia is to give 15 grams of a fast-acting carbohydrate. In a hypoglycemic state, the priority is to quickly raise the blood glucose level. Administering glucagon intramuscularly (Choice A) is reserved for severe hypoglycemia when the client is unable to take oral carbohydrates. Providing a complex carbohydrate snack (Choice B) is beneficial after the initial treatment of hypoglycemia to prevent recurrence. Administering 50% dextrose intravenously (Choice C) is a more invasive intervention typically done in a hospital setting for severe cases.

Correct Answer: A

Rationale: The correct answer is to use sunblock or protective clothing when outdoors. Methotrexate can cause photosensitivity, making the child more prone to sunburns and skin damage. Therefore, advising the parents to protect their child's skin from direct sunlight exposure is crucial. Choice B is incorrect because exposing the child to direct sunlight without protection can worsen the photosensitivity caused by methotrexate. Choice C is incorrect as obtaining vaccinations is generally avoided during chemotherapy due to the child's compromised immune system. Choice D is incorrect as commercial mouthwash may contain alcohol, which can be irritating to the child's oral mucosa, especially during chemotherapy.