Correct Answer: D

Rationale: The correct answer is D: Administer morphine. Administering morphine is the first intervention for a client experiencing a myocardial infarction (MI) to help relieve pain and reduce anxiety. Oxygen may not be necessary if the client is not hypoxic. Administering aspirin is important but usually follows morphine. Monitoring ECG is crucial, but not the first intervention to address the immediate symptoms of MI.

Correct Answer: B

Rationale: The correct answer is B: Vitamin B12. Strict vegetarians, especially those who exclude all animal products, are at risk of Vitamin B12 deficiency as it is primarily found in animal products. Vitamin C (A) deficiency is more common in those with poor fruit and vegetable intake. Vitamin E (C) deficiency is rare and usually seen in individuals with specific medical conditions. Magnesium (D) deficiency can occur in individuals with poor dietary intake or certain medical conditions, but it is not the primary concern for strict vegetarians.

Correct Answer: B

Rationale: Mammography is used to detect tumors in the breast tissue. It is a screening tool for breast cancer. Tumors can be either benign or malignant. Mammograms help in early detection of abnormalities in breast tissue. Pain, edema, and epilepsy are unrelated to the purpose of mammography. Pain is a symptom, edema is swelling, and epilepsy is a neurological disorder. Therefore, the correct answer is B because mammography is specifically designed to detect tumors in the breast.

Correct Answer: A

Rationale: The correct answer is A: Administer pain relief. This is the priority action because managing pain is crucial in providing comfort and reducing distress for the client with a severe burn. Pain relief helps in improving the client's overall well-being and promotes better recovery. Administering corticosteroids (Choice B) is not the priority as pain relief takes precedence. Monitoring for infection (Choice C) is important but not the immediate priority. Applying dressings (Choice D) is also important but should come after administering pain relief.

Correct Answer: A

Rationale: The nurse should first administer aspirin to a client with chest pain as it helps prevent blood clot formation during a possible heart attack. Aspirin inhibits platelet aggregation, reducing the risk of further blockage in the coronary arteries. Administering aspirin promptly can improve the client's outcomes. Performing an ECG, monitoring vital signs, or providing a meal plan are important but should come after administering aspirin in the initial management of chest pain to prioritize the client's safety and well-being.