In fingerprint examination, a latent print on a non-porous surface (glass) is developed by aluminium powder dusting. The print contains ridge endings, bifurcations, and a single triradius. This is MOST consistent with which fingerprint pattern?

• A Loop (either ulnar or radial) ✓
• B Whorl
• C Arch (plain)
• D Composite (central pocket loop whorl)

Explanation

Loops are the most common fingerprint pattern (~65% of population) and are defined by ridges that enter from one side, make a backward turn (core), and exit from the same side. A loop has exactly ONE triradius (delta). Whorls have two triradii. Plain arches have NO triradius (no delta). Composite patterns are whorls with two triradii but with a loop within. The presence of a single triradius with a core makes this a loop.

Reference: The Essentials of Forensic Medicine and Toxicology (Narayan Reddy), 34th ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

Written and medically reviewed by the StethoPrep medical team.