**Core Concept**
Submucosal glands are a type of exocrine gland located in the lamina propria beneath the mucosa of various organs. They play a crucial role in the production of mucus and other secretions that aid in digestion and protection of the mucosal surface.

**Why the Correct Answer is Right**
The correct answer is related to the pancreas, which contains a large number of submucosal glands known as pancreatic acinar cells. These cells produce digestive enzymes that are secreted into the pancreatic duct and eventually into the small intestine for digestion. The pancreas is an organ that produces digestive enzymes and hormones like insulin and glucagon.

**Why Each Wrong Option is Incorrect**
**Option A:** The stomach has mucous glands in the lamina propria, but they are not referred to as submucosal glands. The gastric mucous glands are primarily responsible for producing mucus to protect the stomach lining.

**Option B:** The liver has bile ducts that produce bile, but it does not contain submucosal glands. The liver plays a crucial role in detoxification, metabolism, and production of bile.

**Option C:** The small intestine has Brunner's glands in the duodenum, which are submucosal glands that produce mucus and bicarbonate to protect the intestinal lining from acid and pepsin.

**Clinical Pearl / High-Yield Fact**
It's essential to remember that submucosal glands are found in various organs, including the pancreas, small intestine, and stomach, but their function and location can vary greatly.

**Correct Answer: C. The small intestine has Brunner's glands in the duodenum, which are submucosal glands that produce mucus and bicarbonate to protect the intestinal lining from acid and pepsin.