Answer: Whorl pattern.
Explanation: In fingerprint classification, the whorl pattern is one containing two or more deltas which are important in determining the whorl type.
Resembling the Greek letter delta, a delta is the point on a friction ridge at or nearest to the point of divergence of two type lines; as such, a delta is a point in whorl prints that lies within an often triangular, three-pronged or funnel-shaped structure; it is the part of a ridge nearest the point where two parallel ridge lines diverge to flow around the whorls. It is worthy to note it is also the point at which ridge counting begins.
