**Core Concept**
Peptic ulcers are mucosal defects in the stomach or duodenum, often caused by Helicobacter pylori infection or the use of nonsteroidal anti-inflammatory drugs (NSAIDs). The pathogenesis of peptic ulcers involves an imbalance between gastric acid production and mucosal defense mechanisms.

**Why the Correct Answer is Right**
The lowest recurrence of peptic ulcers is associated with the eradication of Helicobacter pylori infection. This is because H. pylori infection is a major risk factor for the development and recurrence of peptic ulcers. Eradication of the bacteria can restore the mucosal defense mechanisms and reduce the production of gastric acid, thereby preventing recurrence. The mechanism involves the inhibition of gastric acid production by reducing the levels of gastric acid-producing enzymes, such as gastrin and histamine.

**Why Each Wrong Option is Incorrect**
**Option A:**
* This option is incorrect because while ranitidine is an H2 receptor antagonist that reduces gastric acid production, it does not address the underlying cause of peptic ulcers, which is often H. pylori infection.

**Option B:**
* This option is incorrect because omeprazole, a proton pump inhibitor, reduces gastric acid production but does not eradicate H. pylori infection, which is a major risk factor for peptic ulcer recurrence.

**Option C:**
* This option is incorrect because while antacids and histamine-2 receptor antagonists can provide symptomatic relief for peptic ulcers, they do not address the underlying cause of the disease and do not reduce the recurrence rate.

**Clinical Pearl / High-Yield Fact**
To reduce the recurrence of peptic ulcers, it is essential to eradicate Helicobacter pylori infection, either through antibiotic therapy or by using a combination of acid-suppressing medications.

**Correct Answer: C. Omeprazole**