Question

Living in the atmosphere of $CO$ is dangerous, because it

• A. combines with $O_2$ present inside to form $C{O}_2$
• B. reduces organic matter of tissues
• C. combines with haemoglobin and makes it incapable to absorb oxygen
• D. dries up the blood

Answer 1

The correct option is C combines with haemoglobin and makes it incapable to absorb oxygen

Carbon monoxide combines with haemoglobin of blood to form a complex called carboxy-haemoglobin. Formation of this complex makes the haemoglobin incapable of oxygen transport. Due to which there will be oxygen deficiency in the blood.
Option (c) is correct