Concept:Human fingerprints are grouped by their ridge patterns into distinct classes.Explanation:The four main classes of fingerprints in humans are:Whorl – ridges form circular or spiral patterns.Arch – ridges rise and fall like waves.Loop – ridges curve back without completing a full circle.Compound – a combination of two or more of the above patterns.Only option C lists these correct classes.Options A, B, and D include incorrect terms such as “alternate,” “opposite,” and “simple.”Answer:C. whorl, arch, compound and loop