This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Medicine
Maastricht classification of donation after cardiac death.What category is stage 3 ? 
Select and explain. 
A. Awaiting cardiac arrest, B. Brought in dead, C. Unsuccessful resuscitation, D. Cardiac arrest after brain-stem death
A: Awaiting cardiac arrest
Answer: A: Awaiting cardiac arrest 
Explanation: Non hea beating donors are grouped according to Maastricht classification . REF: WASHINGTONS MANUAL OF CRITICAL CARE