The ratio of cardiac compression and artificial breathing is?

Correct option is D

Sol. According to American Heart Association (AHA) guidelines for adult CPR, the ratio of chest compressions to rescue breaths is 30:2. This ensures adequate perfusion and oxygenation until advanced care arrives. Consistency in compressions improves chances of survival.
Explanation of each option:
· (a) 15:2 – Was used earlier for children or two-rescuer infant CPR, but not standard for adults.
· (b) 60:6 – This is not a recognized or recommended CPR ratio for any age group.
· (c) 12:3 – Incorrect; this combination is not used in any resuscitation guidelines.
· (d) 30:2 – Correct. Universally accepted for single-rescuer adult CPR — 30 compressions followed by 2 breaths.