Answer:
Methenamine silver is often used in the demonstration of (d) chromaffin.
Step-by-step explanation:
Methenamine silver is a histological staining method that is used to demonstrate the presence of certain types of cells and tissues. This staining technique involves the use of a silver salt, such as silver nitrate or ammoniacal silver, which reacts with certain cellular components to produce a black or brown color. One of the components that can be stained using methenamine silver is chromaffin, which is found in the adrenal gland and produces hormones such as adrenaline and noradrenaline.
Copper, bile, and urates cannot be demonstrated using methenamine silver staining.