Question

what is the name of the malabsorption test that stains fat bright orange?

Explanation:

Sudan III is a fat - soluble dye. In the context of malabsorption testing, when it comes into contact with fat, it stains the fat bright orange. This property makes it useful for visualizing and detecting the presence of fat in relevant samples (such as fecal samples in some malabsorption investigations).

Answer:

Sudan III