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On prolonged exposure to high concentration of carbon monoxide (> 5000 ppm), man dies because | |
A. | of clotting of blood. [Wrong Answer] |
B. | of jamming of respiratory tract. [Wrong Answer] |
C. | it forms carboxyhaemoglobin by combining with haemoglobin of blood, thereby making it incapable of absorbing oxygen. [Correct Answer] |
D. | it forms CO2 by combining with oxygen present in the blood. [Wrong Answer] |