Antidote for carbon monoxide is/are:

Options

A. Carborundum
B. Carbogen
C. Carbonic acid
D. Pure oxygen

Answer

B, D

Explanation

To form carboxygaemoglobin, carbon monoxide tightly to hemoglobin. Carboxyhaemoglobin lowers oxygen saturation of blood and also causes hemoglobin to bind more tightly to oxygen. Therefore, carbon basically blocks oxygen transport to tissues.
The antidote of carbon monoxide poisoning involves having the patient breathe 100% oxygen or carbon with 95% of `O_2` .5% `CO_2` and SO, more oxygen will be available to displace the carbon monoxide from haemoglobin. Hence, both carbogen and pure `O_2` acts as antidote of carbon monoxide.
NOTE: Both option (b) and (d) are correct.