Which of the process is known as nitrification? A. Reaction of Nitrogen Monoxide with oxygen to form nitric acid B. Reaction of nitrogen dioxide with water to form nitric acid C. Conversion of ammonia to nitrites D. Conversion of nitrite to nitric oxide

The correct answer is C. Conversion of ammonia to nitrites.

Nitrification is the process by which ammonia is converted into nitrites and then into nitrates. This process is carried out by bacteria in the soil. Nitrification is an important process in the nitrogen cycle, as it helps to convert ammonia, which is a relatively toxic form of nitrogen, into nitrates, which are a more usable form of nitrogen for plants.

Option A is incorrect because it describes the reaction of nitrogen monoxide with oxygen to form nitric acid. This reaction is not part of the nitrification process.

Option B is incorrect because it describes the reaction of nitrogen dioxide with water to form nitric acid. This reaction is also not part of the nitrification process.

Option D is incorrect because it describes the conversion of nitrite to nitric oxide. This reaction is not part of the nitrification process.