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Ramcharan is sleeping in a closed room with a coal fired fire place (Angithi) inside, on a cold wintry night. Which one of the following is correct about the chemical reaction in Ramcharan's respiratory system if there is no fresh air can enter the room?

A) Haemoglobin combines with carbon monoxide in the blood to form carboxy-haemoglobin, which cannot carry oxygen causes a deficiency of oxygen in the tissues.

B) Haemoglobin combines with carbon monoxide in the blood to form carbohydrates which causes excess of carbohydrates and deficiency of oxygen in the tissues.

C) Haemoglobin combines with carbon monoxide in the blood to form carbon tetrachloride causes dificiency of oxygen in the tissues.

D) All of these

E) None of these