Rapid and deep breathing without other signs of respiratory distress may be caused by the following EXCEPT:

Correct Answer: C

Rationale: Rapid, deep breathing (Kussmaul breathing) is typically associated with diabetic ketoacidosis, renal tubular acidosis, and CNS stimulants. Heart failure typically causes shallow, labored breathing, not deep breathing without distress.

Correct Answer: C

Rationale: Croup is more common in males, affecting young children with a characteristic barking cough and stridor. Parainfluenza virus is the leading cause, with peak incidence around 6 months to 3 years.

Correct Answer: D

Rationale: Complete androgen insensitivity syndrome follows an X-linked recessive pattern, as it results from mutations in the androgen receptor gene on the X chromosome.

Correct Answer: B

Rationale: Medullary relapse, or recurrence of leukemia in the bone marrow, is the most common form of relapse in acute leukemia, requiring additional chemotherapy.

Correct Answer: C

Rationale: Digitalis is primarily used for heart failure and atrial fibrillation, not typically in resuscitation. Epinephrine and atropine are more relevant in emergency situations.