If CPR is not performed, how many minutes will elapse before the brain becomes damaged from lack of oxygen?

A. 1

B. 2

C. 4

D. 10

If CPR is not performed, C. 4 minutes will elapse before the brain becomes damaged from lack of oxygen.

One minute isn't enough time - you can even hold your breath for one minute without fainting. Some people can even do it for 2 minutes.

Ten minutes is too long - you would be long dead.

The answer is C - 4 minutes