Correct option is A
Sol. The American Heart Association (AHA) recommends a chest compression depth of at least 2 inches (5 cm) for adult CPR. This depth ensures adequate blood circulation to the brain and vital organs. Compressions that are too shallow may be ineffective, while excessive depth may cause rib fractures. Proper CPR technique, including allowing full chest recoil, is essential for increasing survival chances.
Explanation of Each Option:
· 2 inch: Correct answer; the recommended compression depth for effective CPR.
· 1 inch: Incorrect; too shallow to generate sufficient blood flow.
· 5 inch: Incorrect; excessively deep and may cause internal injuries.
· 3 inch: Incorrect; although closer to the correct range, 2 inches is the recommended minimum.