This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardiopulmonary Cerebral Resuscitation, Subject name: Anaesthesia
Ratio of ventilation to cardiac compression in adult CPR with two rescuers is: 
Select and explain. 
A. 1:15, B. 2:30, C. 30:02:00, D. 2:10
B: 2:30
Answer: B: 2:30 
Explanation: During cardiopulmonary resuscitation of adults,the ratio of chest compression to rescue breaths is 30:2 irrespective of the number of rescuers. High-quality CPRinvolves adequatechest compressions to a depth of at least 5 cm in adults. In infants and children, the ratio is 30:2 for a single rescuer and 15:2 if 2 or more rescuers are present. NOTE THAT IN QUESTION: VENTILATION : COMPRESSION is asked so.. , ratio will be 2:30