When the heart stops brain death occur within how many minutes or hours?

When the heart stops the brain, death occurs within a measurable 20 to 40 seconds.

Time is very important when an unconscious person is not breathing. Permanent brain damage begins after only 4 minutes without oxygen, and death can occur as soon as 4 to 6 minutes later.

hope that helps;))

Agonist is the answer i believe

Your answer is c- spermicides!