Moderate

Carbon monoxide is a pollutant because:

Correct answer: C. Reacts with haemoglobin

  • A. It reacts with O2
  • B. It inhibits glycolysis
  • C. Reacts with haemoglobin
  • D. Makes nervous system inactive

Explanation

Carbon monoxide binds strongly with haemoglobin to form carboxyhaemoglobin, reducing the blood's capacity to carry oxygen. This can cause tissue hypoxia, especially in the brain and heart.

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