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Which one of the following organs in the human body is most affected due to shortage of oxygen?

1. (a) intestine
2. (b) skin
3. (c) kidney
4. (d) brain

Correct answer: (d) brain

Solution

The brain is most sensitive to oxygen shortage because its cells rely heavily on a constant oxygen supply to produce energy. Even brief deprivation can quickly impair function and cause damage.

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