Correct Answer: B

Rationale: In cystic fibrosis, thick mucus obstructs the airways, making it difficult to clear from the lungs. Cough suppressants can help reduce the discomfort associated with persistent coughing, allowing the child to cough more effectively to clear the mucus, thus promoting pulmonary function. Chest physiotherapy, not exercise, helps mobilize the mucus. Oxygen therapy may be needed but is not the most important for promoting pulmonary function in this case.

Correct Answer: B

Rationale: The most effective way to prevent hypoglycemia during physical activity in a child with type 1 diabetes is to ensure they eat a snack before exercising. Eating a snack before exercise helps maintain blood glucose levels by providing additional glucose for energy during physical activity, reducing the risk of hypoglycemia. Giving extra insulin before exercise (Choice A) can increase the risk of hypoglycemia as it lowers blood glucose levels further. Limiting physical activity (Choice C) is not recommended as exercise is important for overall health. Monitoring blood glucose levels after exercise (Choice D) is essential but does not directly prevent hypoglycemia during physical activity.

Correct Answer: A

Rationale: When dealing with seborrheic dermatitis (cradle cap) in infants, it is essential to use a soft brush and gently scrub the affected area to help remove the scales. This process can aid in managing the condition and preventing further build-up. It is important to be gentle to avoid irritating the baby's delicate skin. Choice B is incorrect as gentle scrubbing with a soft brush can help in the removal of scales. Choice C is incorrect because regular but gentle washing is recommended to manage cradle cap. Choice D is incorrect as using specialized shampoos designed for cradle cap is usually recommended over soap and water.

Correct Answer: A

Rationale: The correct intervention for a child with Kawasaki disease, presenting with irritability and skin peeling, is to place the child in a quiet environment. This helps reduce environmental stimuli, calming the child and aiding in managing the symptoms associated with the disease. Choice B is incorrect as addressing food preferences is not the priority in this situation. Choice C is incorrect as the focus should be on the child's immediate needs. Choice D is incorrect as applying lotion is not the first-line intervention for Kawasaki disease symptoms.

Correct Answer: B

Rationale: The findings are consistent with coarctation of the aorta, where narrowing of the aorta leads to decreased blood flow to the lower extremities. This results in higher blood pressure in the arms compared to the lower extremities, pounding brachial pulses, and slightly palpable femoral pulses. Choices A, C, and D are incorrect because they do not align with the pathophysiological mechanisms of coarctation of the aorta, which specifically involves narrowing of the aortic lumen reducing blood flow to the lower extremities.