Correct Answer: C

Rationale: The correct answer is to record the best of three attempts when using a peak flow meter. This method provides a more accurate measure of peak expiratory flow. Choice A is incorrect because using the device before taking medication may not reflect the actual peak flow, as medication can affect lung function. Choice B is incorrect as using the device during asthma attacks may not be feasible or safe, as the focus during an attack should be on managing symptoms rather than measuring peak flow. Choice D is incorrect because using the device after eating may not provide an accurate measurement of peak flow, as digestion can affect lung function temporarily.

Correct Answer: A

Rationale: The correct answer is to 'Eat more food when planning to exercise more than usual.' Increased physical activity requires more energy, so additional food intake is necessary to prevent hypoglycemia. Choice B is incorrect because the method of insulin administration should not be altered based on physical activity. Choice C is incorrect as insulin timing should be consistent rather than based on anticipated exercise. Choice D is incorrect since relying on foods with sugar can lead to unstable blood sugar levels, which is not ideal for managing diabetes during exercise.

Correct Answer: A

Rationale: The most appropriate statement by the nurse in this scenario is to inquire about the family's daily routine. This question allows the nurse to gather information about the family dynamics, the care routine for the infant post-surgery, feeding schedules, and potential stressors. It opens the conversation in a non-intrusive manner and helps the nurse assess the family's situation to provide appropriate support. Choices B, C, and D do not address the situation effectively. Asking about the daily routine is crucial for the nurse to understand the family's needs and offer targeted assistance.

Correct Answer: D

Rationale: Asking the parents if they smoke in the home is the most relevant question as exposure to secondhand smoke can exacerbate respiratory symptoms like wheezing and difficulty breathing in children. This information is crucial for identifying potential triggers for the child's symptoms. Inquiring about child safety in the home, asking about the child's temperament, and inquiring about the child's diet, while important aspects of care, may not directly address the respiratory symptoms the child is experiencing.

Correct Answer: A

Rationale: The correct answer is A: Varicella (Chickenpox). Varicella can lead to the complication of encephalitis, characterized by brain inflammation. Encephalitis is a known complication of chickenpox in rare cases. Scarlet fever (choice B) is caused by Streptococcus bacteria and does not typically result in encephalitis. Poliomyelitis (choice C) primarily affects the spinal cord and does not lead to encephalitis. Whooping cough (choice D) can cause severe coughing spells but does not directly result in encephalitis.