The type of bacteria which oxidize CO into CO2 is:

Explanation

The correct answer is Pseudomonas because some species within this genus have the unique ability to oxidize carbon monoxide (CO) as a source of energy, facilitating their survival in environments where CO is present. The other options are incorrect because:Norcardia salmonicolor is involved in the degradation of organic compounds, not CO oxidation.Hydrogenomonas utilizes hydrogen rather than carbon monoxide.Thiobacillus is associated with sulfur and carbon cycles but does not oxidize CO.Azobacter is known for nitrogen fixation and does not rely on carbon monoxide for energy.Thus, Pseudomonas stands out as the only correct option in this context.