**Question:** Ligature mark is horizontal in -

A. Pharynx
B. Trachea
C. Esophagus
D. Stomach

**Core Concept:** Ligature marks are indirect signs of manual or ligature strangulation, which can be seen on post-mortem examination. They indicate ligature constriction around a particular organ or structure.

**Why the Correct Answer is Right:** The correct answer is B. Trachea, because in strangulation cases, the ligature usually applies pressure to the trachea, causing a horizontal mark on the tracheal wall due to the constriction.

**Why Each Wrong Option is Incorrect:**

A. Pharynx: Although ligature marks can appear in the pharynx, they are less common and usually result from indirect strangulation, not direct ligature constriction.
B. Stomach: While ligature marks can appear on the stomach wall, they are generally not horizontal but rather vertical, corresponding to the spiral pattern of the stomach's serosal surface.
C. Esophagus: Similar to stomach marks, ligature marks on the esophagus will typically be vertical, reflecting the circular pattern of the esophageal wall.

**Clinical Pearl:**

In forensic medicine, it is essential to consider various factors when evaluating ligature marks. These include the angle of application, the material used (hard or soft), and the duration of constriction. By understanding the specific characteristics of ligature marks on various organs, pathologists can provide valuable insights into the mechanisms of strangulation and contribute to forensic investigations.

**Correct Answer:** B. Trachea