According to Johnson’s classification prepyloric Plus duodenal ulcers is
**Core Concept**
Johnson's classification is a system used to categorize the location of peptic ulcers. It differentiates between gastric ulcers, duodenal ulcers, and prepyloric ulcers based on their proximity to the pylorus. This classification is essential in understanding the pathophysiology and clinical presentation of peptic ulcer disease.
**Why the Correct Answer is Right**
According to Johnson's classification, prepyloric ulcers are located between 1-3 cm proximal to the pyloric ring. This classification helps in differentiating prepyloric ulcers from duodenal ulcers, which are located more proximally in the duodenum. The correct classification is crucial in guiding treatment decisions and predicting outcomes in patients with peptic ulcer disease.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not accurately describe the location of prepyloric ulcers according to Johnson's classification.
**Option B:** This option is incorrect because it is not a valid classification for peptic ulcers.
**Option C:** This option is incorrect because it does not accurately describe the location of prepyloric ulcers.
**Clinical Pearl / High-Yield Fact**
Johnson's classification is a useful tool for clinicians to differentiate between gastric, duodenal, and prepyloric ulcers, which can have distinct clinical presentations and treatment requirements.
**Correct Answer:** C.