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Which medical procedures are used when a person's heart or lungs have stopped working?

  1. Physical therapy

  2. Surgery

  3. Radiation therapy

  4. Cardiopulmonary resuscitation

The correct answer is: Cardiopulmonary resuscitation

Cardiopulmonary resuscitation, commonly known as CPR, is the correct answer as it is a life-saving procedure used in emergencies when an individual's heart or lungs have ceased functioning. This technique involves a combination of chest compressions and artificial ventilation to maintain blood flow and oxygenation until professional medical help arrives or the person's heart starts beating again. In contrast, physical therapy focuses on rehabilitation and restoring physical function rather than addressing immediate life-threatening conditions. Surgery is a medical intervention that may be required for various health issues but is typically not the first response in a situation of cardiac or respiratory arrest. Radiation therapy is used primarily for cancer treatment and does not have a role in emergency situations involving the heart or lungs.