A 2-month-old infant presents with cough, tachypnea, and wheezing. The most likely viral cause is:

Correct Answer: D

Rationale: Respiratory syncytial virus (RSV) is the most common cause of bronchiolitis in infants, presenting with cough, tachypnea, wheezing, and respiratory distress. It spreads via respiratory droplets and is especially severe in premature and immunocompromised infants.

Correct Answer: C

Rationale: Climate change poses a major threat to food security by affecting crop yields and causing extreme weather events that disrupt agriculture.

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: C

Rationale: Hyperventilation is the compensatory mechanism for metabolic acidosis, leading to increased CO2 elimination and normalization of pH.

Correct Answer: B

Rationale: Look-Listen-Feel is a primary assessment step in BLS to check for effective breathing before initiating rescue breaths or CPR.