Which of the following means a toxic condition associated with renal insufficiency and produced by the retention in the blood of nitrogenous substances normally excreted by the kidney?

Which of the following means a toxic condition associated with renal insufficiency and produced by the retention in the blood of nitrogenous substances normally excreted by the kidney?
A) Hematuria
B) Bright disease
C) Uremia
D) Crohn disease