Which one of the following gases converts haemoglobin into carboxy haemoglobin?

Step-by-step solution

Carbon monoxide ( CO ) converts haemoglobin to carboxyhaemoglobin. When CO is inhaled, it binds with haemoglobin in red blood cells with a much higher affinity compared to oxygen. This binding forms carboxyhaemoglobin which prevents the normal binding of oxygen to. haemoglobin, leading to a decreased oxygen-carrying capacity of the blood.