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Hemoglobin reacts with carbon monoxide to form a stable compound, while its reaction with oxygen results in an unstable oxyhemoglobin.

1. Hemoglobin reacts with carbon monoxide to form a stable compound.
2. Hemoglobin reacts with oxygen to produce an unstable oxyhemoglobin.
3. Both statements provided are accurate.
4. Neither of the statements is correct.

Correct answer: Both statements provided are accurate.

Solution

Both statements are correct as hemoglobin binds more strongly with CO to form a stable compound (HbCO), while its binding with O2 to form oxyhemoglobin (HbO2) is weaker and reversible.

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