Clinical presentations of chronic heart failure in infancy may include all the following Except:

Correct Answer: C

Rationale: Acute weight gain is not a common sign in chronic heart failure in infancy; rather, poor weight gain and growth failure due to increased metabolic demand are more typical.

Correct Answer: B

Rationale: Ignoring the behavior allows the child to outgrow it naturally without drawing unnecessary attention. Reassurance and encouragement are also helpful but ignoring avoids reinforcing the habit.

Correct Answer: C

Rationale: Group A beta-hemolytic streptococcal infections are linked to pediatric autoimmune neuropsychiatric disorders (PANDAS), which can trigger OCD.

Correct Answer: C

Rationale: Angioedema is not a major criterion for atopic dermatitis; it is more associated with allergic reactions.

Correct Answer: D

Rationale: Methylxanthines decrease pulmonary vascular resistance, not increase it. The other options are therapeutic effects of methylxanthines.