Plain Radial is a specific type of which general fingerprint pattern?

• A. Arch
• B. Accidental Double
• C. Plain Radial
• D. Ulnar

Answer: (C)

Fingerprint patterns are grouped into arches, loops, and whorls. Plain radial describes a loop pattern, specifically a radial loop. In a radial loop, ridges enter and exit toward the thumb side of the hand, forming a loop that opens toward the radius. The term plain means a straightforward loop without extra features. So plain radial is categorized under loops as a radial-loop subtype.