Multiple choice general knowledge science & technology

How many minutes your brain can survive without oxygen before it starts to die?

  1. 2-3

  2. 4-6

  3. 6-8

  4. 8-10
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Brain cells begin to die within 4-6 minutes without oxygen supply. This window is why immediate CPR and emergency response are critical in cases of cardiac arrest or drowning. Beyond 6 minutes, the risk of permanent brain damage increases significantly. The 2-3 minute range is too short, while 6+ minutes risks damage.

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