Extreme eosinophilia suggests

Correct Answer: A

Rationale: Drug reactions, particularly hypersensitivity reactions, can cause extreme eosinophilia as part of a systemic immune response.

Correct Answer: D

Rationale: Sodium is primarily distributed in extracellular fluid, with a volume of distribution of about 0.6 times total body weight, including interstitial and intravascular compartments.

Correct Answer: D

Rationale: Exercise is a less common cause of anaphylaxis compared to foods, drugs, insect stings, and latex.

Correct Answer: B

Rationale: The steeple sign, seen on X-ray, is a hallmark of viral croup, indicating subglottic airway narrowing.

Correct Answer: C

Rationale: Male gender, rather than female, is a known risk factor for asthma morbidity and mortality, particularly in childhood.