Okay, let's tackle this question about Brunner's glands. The question is asking which of the options is not true about these glands. First, I need to recall what Brunner's glands are and their characteristics.

Brunner's glands are found in the duodenum, specifically in the submucosa layer. They are also called duodenal submucosal glands. Their main function is to secrete alkaline mucus, which helps neutralize the acidic chyme coming from the stomach. This mucus also contains enzymes like peptidases and glycosidases to start digesting proteins and carbohydrates.

Now, the question is looking for the exception. Let me think about their structure and function. They are tubuloalveolar glands, which means they have both tubular and alveolar (acinar) structures. The secretions are alkaline, so they help protect the duodenal lining from stomach acid. They don't produce pepsin or hydrochloric acid, which are stomach-related. So if any option says they secrete HCl or pepsin, that would be incorrect.

Another point is that Brunner's glands are not present in the stomach. So if an option mentions them being in the stomach, that's wrong. Also, they are not found in the jejunum or ileum beyond the duodenum.

Let me consider possible distractors. If an option states that they are found in the stomach, that's incorrect. Another might say they produce hydrochloric acid, which is wrong because that's a stomach function. Another could claim they are exocrine glands, which is correct, but if an option says they are endocrine, that's wrong. Or maybe an option says they secrete digestive enzymes directly into the lumen, but actually, their secretions are into the submucosa to neutralize the acid before it reaches the mucosa.

Wait, the correct answer is the one that's false. So the incorrect statement would be something like "Brunner's glands are found in the stomach" or "they secrete HCl". Let me check the options again. Since the user didn't provide the actual options, I need to infer based on common mistakes. Common false options might include location (stomach), secretion type (HCl, pepsin), or incorrect function.

So the correct answer here would be the option that states Brunner's glands are located in the stomach. That's the exception. The other options would be true statements. For example, they are in the duodenum, secrete alkaline mucus, have tubuloalveolar structure, and help neutralize acid.

Now, putting it all together. The core concept is the structure and function of Brunner's glands. The correct answer is the one that incorrectly states their location in the stomach. The other options would be true. The clinical pearl is to remember that Brunner's glands are in the duodenum, not the stomach, and their role in neutralizing acid.

**Core Concept** Brunner glands are tubuloalveolar submucosal glands located in the **duodenum**. They secrete **alkaline mucus** containing **peptidases** and **glycosidases** to neutralize gastric acid and initiate digestion, protecting the duodenal mucosa.

**Why the Correct Answer is

✓ Correct Answer: A. Present in Lamina Propria of Duodenum