2. Which is the most common cause of cardiac arrest in children? a. Cardiac problem b. Congenital or acquired heart defect c. Respiratory failure or shock d. Infection and sepsis

The correct answer is c. Respiratory failure or shock.<br /><br />Cardiac arrest in children is most commonly caused by respiratory failure or shock. This can occur due to various reasons such as severe infections, trauma, or other underlying medical conditions that lead to a sudden and significant drop in blood pressure and oxygen levels in the body.