Stool of a person is whitish grey coloured due to malfunction of which of the following organs?

Stool of a person contain whitish grey colour due to malfunction of which type of organ :

In the vast marine ecosystem, certain sea develop red colouration. This red colour is due to the presence of large population of which one of the following organisms ?

In jaundice, skin and eyes turn yellow due to the deposition of bile pigments. This disease is due to malfunctioning of which organ?

In jaundice, skin and eyes turn yellow due to the deposition of bile pigments. This disease is due to malfunctioning of which organ?

Yellow colour of usual nitric acid is due to the presence of which one of the following ?

In the detection of nitrogen of an organic compound by Lassaigne's test, Prussian blue colour is obtained . This is due to the formation of which of the following complexes ?