Correct Answer: D

Rationale: A low-phenylalanine diet is required for infants with PKU to prevent the buildup of phenylalanine, which can lead to brain damage.

Correct Answer: A

Rationale: The American Academy of Pediatrics recommends the intramuscular polio vaccine over the oral vaccine due to its superior safety profile. Intramuscular administration ensures better immunogenicity and protection against poliovirus. Choice B is incorrect as the intramuscular vaccine is preferred for safety reasons. Choice C is incorrect because the recommendation is based on safety, not cost. Choice D is incorrect as the CDC recommendation is not solely based on immunocompromised status but rather on the overall safety and efficacy of the vaccine.

Correct Answer: B

Rationale: Assessing the child's dietary intake is crucial in managing asthma as certain foods can trigger symptoms or exacerbate the condition. Monitoring the child's diet can help identify triggers, ensure proper nutrition, and support the child's overall health. Assessing sleep patterns (Choice A) may be relevant but is not as directly linked to asthma management as dietary intake. Academic performance (Choice C) and behavior at home (Choice D) are important aspects of a child's well-being but are not directly related to asthma management.

Correct Answer: C

Rationale: In cases where child abuse is suspected, it is crucial to prioritize the safety and well-being of the child. Advising the parents that the child needs to be transported allows for the child to receive necessary medical care without immediate confrontation. Calling the police to have the parents arrested (Choice B) may escalate the situation and should only be done after ensuring the child's safety. Informing the parents of suspicions (Choice A) may potentially place the child at further risk if the parents are the abusers. Transporting the child to the hospital regardless of the parents' wishes (Choice D) could lead to legal and ethical complications; it is important to involve the appropriate authorities and handle the situation with sensitivity and care.

Correct Answer: B

Rationale: In Addison's disease, adrenal insufficiency leads to decreased aldosterone production. The decreased aldosterone results in impaired sodium reabsorption and potassium excretion, leading to hyperkalemia. Hypernatremia (Choice A) is unlikely because sodium reabsorption is impaired. Hyperglycemia (Choice C) is not a typical lab finding in Addison's disease. Hypercalcemia (Choice D) is not associated with Addison's disease; rather, it can be seen in conditions like hyperparathyroidism.