"Bilirubin is primarily excreted through the kidneys." This statement is not accurate.

While some bilirubin is excreted through the kidneys, the primary route of bilirubin excretion is through the liver and bile.

Bilirubin is converted to conjugated bilirubin in the liver, which is then excreted in bile.

Choice B rationale:

"Bilirubin is stored in the liver as hemosiderin." This statement is incorrect.

Hemosiderin is not a form of bilirubin but rather a storage form of iron in the liver and other tissues.

Choice C rationale:

"Bilirubin is recycled into iron and biliverdin." This statement is not accurate.

Bilirubin is primarily metabolized in the liver and conjugated before being excreted in bile.

It does not get recycled into iron and biliverdin.

Choice D rationale:

"Bilirubin is conjugated in the liver and excreted in bile." This is the correct answer.

Bilirubin is produced from the breakdown of heme in red blood cells and is then processed in the liver, where it is conjugated (combined with glucuronic acid) to form conjugated bilirubin.

Conjugated bilirubin is excreted in bile and eventually eliminated from the body in feces.