Which option correctly states the two components of adult CPR?

• A. 50 compressions, 5 breaths
• B. 15 compressions, 2 breaths
• C. 60 compressions, 3 breaths
• D. 30 compressions, 2 breaths

Answer: (D)

Adult CPR combines two actions: chest compressions to keep blood circulating and rescue breaths to supply oxygen to the lungs and bloodstream. The standard approach for a single rescuer is to perform 30 chest compressions, then give 2 breaths, and repeat this cycle. This 30:2 pattern efficiently balances generating blood flow with delivering oxygen, which is why it’s the best representation of the two components in adults. In contrast, other ratios like 15:2 are used in different scenarios (such as two rescuers on children), and the numbers shown in the other options don’t reflect the typical adult CPR standard.