Which fingerprint pattern type describes a combination of two or more patterns that does not fit a single category?

• A. Central Pocket
• B. Plain Radial
• C. Accidental Double
• D. Ulnar

Answer: (C)

In fingerprint pattern classification, most impressions fit neatly into one category—loops (radial or ulnar), whorls (including central pocket), or arches. When a print shows features from two different pattern types and can’t be placed into a single category, examiners describe it as an accidental pattern. If that mixed impression actually contains two distinct patterns, it’s called an accidental double. That’s why this option is the best answer: it specifically describes a combination of two or more patterns that doesn’t fit a single category. The other options describe single-pattern types—central pocket is a whorl variant, plain radial and ulnar are loop orientations—so they don’t capture the idea of a mixed pattern.