This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Death and postmortem changes, Subject name: Forensic Medicine
&;BEATING HEA DONOR&; refers to 
Select and explain. 
A. Molecular death, B. Vegetative state, C. Cerebral death, D. Brain stem death
D: Brain stem death
Answer: D: Brain stem death 
Explanation: THE BEATING-HEA DONOR: After brain stem death has been established, the retention of the patient on the ventilator facilitates a fully oxygenated cadaver transplant, the so-called "beating-hea donor". The results of the transplant are much improved. This has no legal sanction. Ref:- k s narayan reddy; pg num:-136