Step 1: Fingerprints are classified into recognised pattern types used in identification. The standard groups are loops, whorls, arches and composite patterns.
Step 2: Loops are the most common, seen in about 60 to 70 percent and include radial and ulnar types. Whorls account for about 25 to 35 percent and include concentric and spiral forms. Arches are seen in about 6 to 7 percent.
Step 3: Composite patterns are the least common at about 1 to 2 percent and include central pocket loops, lateral pocket loops, twinned loops and accidentals.
Step 4: Circles is not a recognised fingerprint pattern type. While whorls may appear concentric, the formal category is whorl, not circle. Hence circles is the option not seen in fingerprints and is the answer.