The MOST likely cause of a 4-year-old boy refusing to go to bed and remaining active is

Correct Answer: C

Rationale: Behavioral insomnia involves resistance to bedtime routines.

Correct Answer: B

Rationale: For effective defibrillation, the paddles should be placed at the apex and right infraclavicular area, ensuring optimal current flow through the heart to terminate life-threatening arrhythmias.

Correct Answer: A

Rationale: Oral antihistamines are the first-line treatment for acute urticaria to relieve itching and reduce hives.

Correct Answer: A

Rationale: The t(4;11) translocation is commonly found in infantile ALL and is associated with a poor prognosis.

Correct Answer: D

Rationale: Postauricular, occipital, and cervical lymphadenopathy are characteristic signs of rubella, often preceding the rash.