One of the following can cause heart failure in a full-term neonate:

Correct Answer: D

Rationale: Severe coarctation leads to critical left ventricular outflow obstruction, causing neonatal heart failure.

Correct Answer: D

Rationale: Uncompensated respiratory alkalosis occurs when excessive breathing reduces CO2 levels, raising pH. Bicarbonate remains normal in the acute phase before renal compensation.

Correct Answer: B

Rationale: Patients with chronic hemolytic anemia receiving more than 8-10 transfusions require iron chelation to prevent iron overload complications.

Correct Answer: B

Rationale: Abdominal mass is the most common presentation of pediatric Non-Hodgkin lymphoma, as it often arises from extranodal sites like the GI tract. Systemic symptoms are less frequent than in Hodgkin lymphoma.

Correct Answer: D

Rationale: Pica requires persistent consumption of non-food items for at least one month to meet diagnostic criteria.