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NEET levelSingle correct optionDifficulty 1 of 3pb186

Carbon monoxide is highly poisonous because it

Ais a strong acid that damages lung tissue
Bbinds to haemoglobin to form carboxyhaemoglobin, which is more stable than oxyhaemoglobin
Cdisplaces iron from haemoglobin
Dreacts with water in blood to give $H X_{2}$

Answer: B

CO has a much higher affinity for the Fe of haemoglobin than

O X_{2}

. Carboxyhaemoglobin forms and blood cannot carry oxygen to tissues.

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