Irreversible loss of all brain functions is called?

• A. Brain death
• B. Whole-brain death
• C. Functional death
• D. Crystallized intelligence

Answer: (B)

The key idea is that death in this context means no remaining brain activity. When there is an irreversible cessation of all brain functions, including the brainstem, the person is considered dead. Some resources use the term whole-brain death to describe this complete loss of brain activity, which matches the definition of brain death and is why this option fits the question. The other terms don’t describe this state: functional death isn’t a standard medical term for brain death, and crystallized intelligence is a cognitive ability, not a description of death.