Which statement correctly contrasts clinical death and brain death?

• A. Both are reversible
• B. Brain death reversible; clinical death not
• C. Clinical death potentially reversible; brain death cannot be reversed
• D. Brain death reversible; clinical death cannot be reversed

Answer: (C)

The main idea here is the difference in reversibility between stopping heart and lung function versus stopping all brain activity. Clinical death means the heart and breathing have stopped, but this can often be reversed if resuscitation restores circulation and oxygenation within a critical window. Brain death, on the other hand, is the complete and irreversible loss of all brain function, including the brainstem; once this occurs, there is no possibility of recovery, even with aggressive life support. So the statement that clinical death is potentially reversible while brain death cannot be reversed best captures that contrast.