Recent studies indicate that a deficiency of which vitamin correlates with increased morbidity and mortality in children with measles?

Correct Answer: A

Rationale: Recent studies have shown that a deficiency of vitamin A correlates with increased morbidity and mortality in children with measles. Vitamin A plays a crucial role in supporting the immune system and helps protect against severe complications of measles, such as pneumonia and vision problems. Children with measles are at higher risk of vitamin A deficiency due to factors such as decreased intake and increased utilization of vitamin A during infection. Providing vitamin A supplementation to children with measles has been shown to reduce the severity of the disease and improve outcomes. Therefore, ensuring adequate vitamin A levels is essential in the management of children with measles to reduce morbidity and mortality.

Correct Answer: A

Rationale: Pilocytic astrocytomas are generally low-grade and less responsive to chemotherapy compared to other listed tumors.

Correct Answer: C

Rationale: Three-year-olds are literal thinkers; if they see a body, they may assume that the person is still present.

Correct Answer: C

Rationale: This milestone is typically achieved around 36 months.

Correct Answer: D

Rationale: Periosteal osteosarcoma is often treated with surgery alone if margins are clear.