Which statement correctly describes loop patterns and their components?

• A. LOOP PATTERNS HAVE TWO DELTAS AND TWO CORES.
• B. ULNAR LOOP -- The ulna is on the same side as the little finger and the flow of the pattern runs toward the little finger.
• C. RADICAL LOOP -- Radial loops flow toward the little finger.
• D. EACH LOOP HAS NO DELTA.

Answer: (B)

Loop patterns in fingerprints are defined by having one core and one delta, with ridges entering, looping around the core, and exiting on the same side. The direction a loop opens tells you whether it’s ulnaward (toward the little finger) or radialward (toward the thumb). In an ulna loop, the ulna bone sits on the little-finger side, so the loop’s ridge flow runs toward that same side. That combination—ulna side alignment and flow toward the little finger—is what makes this statement correct.

Two deltas and two cores describe the anatomy of whorls, not loops, so that would be inappropriate for loops. Radial loops actually flow toward the thumb side, not toward the little finger, so that statement is incorrect. And loops do have a delta, so claiming none exist is false.