Which of the following ridge patterns is most common in fingerprints?

The most common ridge pattern found in fingerprints is loops. This pattern is characterized by ridges that enter from one side, curve around, and exit on the same side. Loops account for approximately 60-70% of all fingerprint patterns, making them the most prevalent type. Their structure typically includes one delta and is crucial for the uniqueness of individual fingerprints.

In contrast, arches and whorls are less common. Arches are identified by ridges that rise in the center but do not have any significant delta, making them less frequent. Whorls, with their circular or spiral formations, are also more uncommon than loops. The delta structure, meanwhile, is a feature seen in some loop and whorl patterns but is not a pattern itself. Thus, loops' prevalence and distinctive characteristics establish them as the most common ridge pattern in fingerprints.