This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Transplantation, Subject name: Surgery
Most Donation after Circulatory Death (DCD) Donors are included in Maastricht category: 
Select and explain. 
A. 2, B. 3, C. 4, D. 5
B: 3
Answer: B: 3 
Explanation: ORGAN DONORS - Organ donors are of two types: Dead or deceased donors & living donors. Maastricht classification for donation after circulatory death (DCD) Donors Category Description (DRACUla) 1 Dead on arrival at hospital 2 Resuscitation attempted without success 3 Awaiting cardiac arrest after withdrawal of suppo (Most DCD donors from category 3 ) 4 Cardiac arrest while brain dead 5 Cardiac arrest & unsuccessful resuscitation in hospital