Correct Answer: D

Rationale: During the preschool age, play activities should promote social, mental, and physical development. Playing dress-up encourages imagination, creativity, and social interaction, making it an ideal play activity for preschoolers.

Correct Answer: C

Rationale: Elevating the head of the bed in a child with hydrocephalus can potentially increase intracranial pressure. This can be counterproductive and may lead to complications after shunt placement surgery. Keeping the head of the bed flat or slightly elevated is often recommended to optimize cerebral perfusion and reduce the risk of increased intracranial pressure.

Correct Answer: A

Rationale: Periorbital ecchymosis, also known as raccoon eyes, is a classic sign of a basilar skull fracture. It presents as bruising around the eyes due to blood collecting in the tissues. Monitoring for periorbital ecchymosis is crucial in assessing a pediatric client with a basilar skull fracture because it can indicate the presence of this serious injury.

Correct Answer: C

Rationale: The correct test for an x-ray examination of the bladder and urethra before and during micturition is a voiding cystourethrogram. This procedure allows visualization of the bladder and urethra while the patient is urinating to assess for any abnormalities in the anatomy or function of these structures.

Correct Answer: D

Rationale: The ketogenic diet increases the risk of kidney stones.