**Question:** Rolled up edges are seen in which of the following ulcer -

A. Gastric ulcer
B. Peptic ulcer
C. Ulcer of Crohn's disease
D. Ulcer of Behcet's disease

**Core Concept:**
The question pertains to the appearance and classification of ulcers, specifically focusing on the type of ulcers that exhibit rolled up edges. Ulcers can be categorized based on their etiology and location. In this context, rolled up edges are a characteristic feature of certain ulcer types.

**Why the Correct Answer is Right:**
The correct answer, 'Peptic ulcer', is right for two reasons:

1. Peptic ulcer is a type of ulcer that develops in the gastrointestinal tract due to the imbalance between aggressive factors (acid and pepsin) and the protective factors (bicarbonate secretion, mucus layer, and defensive mechanisms). Peptic ulcers can occur in the stomach (gastric ulcer) or the duodenum (duodenal ulcer).
2. Peptic ulcers, particularly those in the stomach (gastric ulcer), often exhibit rolled up edges due to the healing process and the presence of granulation tissue. These rolled up edges are a characteristic feature of healing peptic ulcers.

**Why Each Wrong Option is Incorrect:**

A. Gastric ulcer: Although gastric ulcers can be associated with rolled up edges, the correct answer is not specific to gastric ulcers alone. Peptic ulcers in general exhibit this feature.
B. Peptic ulcer: As mentioned earlier, peptic ulcers can have rolled up edges due to the healing process and granulation tissue, making this option incorrect as well.
C. Ulcer of Crohn's disease: Ulcers associated with Crohn's disease are typically aphthous, and the rolled up edges are not characteristic of this type of ulcer.
D. Ulcer of Behçet's disease: Ulcers in Behçet's disease mainly affect the mouth, genitals, and eyes, not the gastrointestinal tract, making this option incorrect.

**Clinical Pearl:**

Rolled up edges in ulcers serve as a pointer for the presence of granulation tissue and healing process. This feature can be observed in various types of ulcers, including peptic ulcers, as well as in other conditions like inflammatory bowel diseases. However, the correct answer, 'Peptic ulcer', is the most appropriate choice due to the characteristic rolled up edges resulting from granulation tissue formation and the healing process.