If the nitrogenous (nitrogen-containing) wastes of protein metabolism build up in the bloodstream, a toxic condition called will result.

If the nitrogenous waste of protein metabolism build up in the bloodstream, a toxic condition called uremia will result. Hence, the answer is uremia.

Explanation:

Uremia is a condition in which the blood nitrogen increases due to intake of nitrogenous products. It is generally filtered through kidneys. The most common nitrogen compound which is taken by the animals is urea. In the water bodies fishes and other aquatic animal are responsible for the release of nitrogen in the water.

These all extra nitrogenous compound makes toxic wastes. If the nitrogen present in the human body is more than the normal condition then it may cause many disorder and diseases to the individual.

Nitrogen is very essential compound for survival of animals and humans but excess quantity of it will lead to some diseases.

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i think the answer is d.