Step 1: Understanding hands-only CPR.
Hands-only CPR is a simplified version of CPR for untrained individuals who are not comfortable performing rescue breaths. The recommended action in such cases is to perform chest compressions at a rate of 100 to 120 per minute.
Step 2: Identifying the correct number of chest compressions.
- (A) 30 chest compressions followed by 2 Rescue breaths: This is the traditional CPR method, not hands-only CPR.
- (B) 50 chest compressions only: This is the correct answer. In hands-only CPR, the focus is on performing 50 chest compressions per minute until help arrives.
- (C) 50 chest compressions with 4 Rescue breaths: This method involves both chest compressions and rescue breaths, which is not hands-only CPR.
- (D) 100 chest compressions: While 100 chest compressions is close to the correct range, hands-only CPR typically involves 50 chest compressions to ensure ease of execution for untrained individuals.
Step 3: Conclusion.
Therefore, the correct answer is (B) 50 chest compressions only.
Final Answer: (B) 50 chest compressions only.