This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Anaesthesia
The ideal parameters for cardiac massage in cardiopulmonary resuscitation are all except ? 
Select and explain. 
A. Force should depress sternum by 11/2 inches, B. Ratio of compression to ventilation should be 15:2, C. Compressions to be given over lower third of sternum, D. Force should depress sternum approximately 1/3 of chest wall diameter
B: Ratio of compression to ventilation should be 15:2
Answer: B: Ratio of compression to ventilation should be 15:2 
Explanation: Ans. is `b,' i.e., Ratio of compression to ventilation should be 15:2