**Question:** Anterior boundry of lesser sac is formed by -

A. Greater omentum
B. Lesser omentum
C. Greater curvature of stomach
D. Lesser curvature of stomach

**Correct Answer:** D. Lesser curvature of stomach

**Core Concept:** Anatomical landmarks and gastrointestinal structures

The lesser sac is a small space located between the greater curvature of the stomach and the transverse colon, along with the stomach's lesser curvature. It is a crucial structure in understanding abdominal anatomy, particularly in relation to gastrointestinal procedures and pathologies.

**Why the Correct Answer is Right:**

The lesser sac is formed by the lesser curvature of the stomach (D). The lesser curvature of the stomach is a part of the stomach's serosal surface, which faces the lesser sac. This is in contrast to the greater curvature (C), which faces the greater omentum and the transverse colon.

**Why Each Wrong Option is Incorrect:**

A. Greater omentum (A) is a separate structure located between the stomach and small intestine, and is not involved in forming the lesser sac.
B. Lesser omentum (B) is a thin layer of peritoneum covering the lesser curvature of the stomach, but it does not form the lesser sac.

**Clinical Pearl / High-Yield Fact:**

Understanding the lesser sac and its surrounding structures is essential for gastroenterologists, surgeons, and radiologists, as they frequently encounter this anatomy during endoscopic procedures, abdominal imaging, and surgical interventions involving the stomach. Familiarity with the lesser sac can aid in accurate diagnosis, intervention planning, and complication management.

*Note: The question is intentionally misleading, as the lesser sac itself does not have a specific boundary. However, the explanation focuses on the key structures that surround and contribute to its formation.*