Correct Answer: A

Rationale: The correct answer is A (5 to 10 mcg/ml) because this range is typically considered therapeutic for phenytoin (Dilantin) for seizure control. Levels below 5 mcg/ml may be subtherapeutic, leading to inadequate seizure control. Levels above 10 mcg/ml can increase the risk of toxicity. Choices B, C, and D are incorrect because they are outside the optimal therapeutic range, leading to either ineffective treatment (B, C) or an increased risk of adverse effects (D). Monitoring drug levels helps ensure the medication's effectiveness while minimizing side effects.

Correct Answer: A

Rationale: The correct answer is A: Type I hypersensitivity reaction. In Type I hypersensitivity, anaphylactic reactions involve immediate IgE-mediated responses to allergens, leading to histamine release and potentially life-threatening symptoms. This type of reaction is characterized by rapid onset and systemic involvement. Choices B, C, and D are incorrect because Type III reactions involve immune complex deposition leading to inflammation (B), Type II reactions involve cytotoxic antibodies targeting cells (C), and Type IV reactions involve delayed cell-mediated responses (D).

Correct Answer: A

Rationale: The correct answer is A: Reassure the patient. The first priority in any accident scenario is to ensure the patient's safety and well-being. By checking if the patient is conscious, the nurse can assess their immediate condition and provide reassurance to alleviate any distress or anxiety. This step establishes communication and trust, allowing for further assessment and appropriate actions to be taken. Calling relatives (B) may be important but not the immediate first step. Bringing the patient immediately to the hospital (C) is premature without assessing the patient first. Calling a doctor (D) can be done after assessing the patient's condition.

Correct Answer: C

Rationale: The correct initial action for the nurse is to choose option C: Notify the physician. Increasing oxygen without a healthcare provider's order can be harmful, especially in COPD patients prone to retaining carbon dioxide. The nurse should communicate the situation to the physician to assess the client's condition and adjust the oxygen therapy appropriately. Option A is incorrect as it neglects the potential risks of high oxygen levels. Option B is incorrect as immediate decrease without proper assessment can be dangerous. Option D is not the priority when the client's oxygen therapy needs evaluation.

Correct Answer: D

Rationale: The correct answer is D: Whole grains and meats. Zinc is found in high amounts in these foods. Meats, especially red meats and seafood, are rich sources of zinc. Whole grains like wheat, rice, and oats also contain significant amounts of zinc. Other choices are incorrect because fruits and vegetables are not typically good sources of zinc. Yeast and legumes are good sources of other minerals but not specifically zinc. It is important for the cancer patient to consume zinc-rich foods to support their immune system and overall health during recovery.