Final answer:
The nurse attributes the result of pH 7.6 to anaerobic metabolism and lactic acid production option (a).
Step-by-step explanation:
The nurse attributes the arterial blood gas result of pH 7.6 to anaerobic metabolism, which caused lactic acid production option (a).
A pH of 7.6 in arterial blood gas after cardiac arrest suggests acidosis, and in the context of resuscitation, it is often associated with anaerobic metabolism leading to lactic acid production. During cardiac arrest, when oxygen supply is compromised, cells switch to anaerobic metabolism, producing lactic acid as a byproduct, leading to an increase in acidity (decreased pH).
(a) Anaerobic metabolism, which caused lactic acid production