Crypts of Lieberkuhn are formed by

Options

A. Mucosa of stomach
B. Mucosa of intestine
C. Sub-mucosa of stomach
D. Sub-mucosa of intestine

Answer

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks about the formation of the Crypts of Lieberkühn. We need to identify which layer of the digestive tract is responsible for their formation.

2. **Identifying the Crypts of Lieberkühn**: The Crypts of Lieberkühn are tubular glands found in the intestinal lining. They are important for secreting intestinal juices.

3. **Locating the Crypts**: These crypts are specifically located in the small intestine.

4. **Identifying the Layer**: The Crypts of Lieberkühn are formed by the mucosa layer of the small intestine. The mucosa is the innermost layer of the gastrointestinal tract and is responsible for various functions including secretion and absorption.

5. **Conclusion**: Based on the information gathered, we conclude that the Crypts of Lieberkühn are formed by the mucosa of the intestine.

6. **Final Answer**: The correct answer is the mucosa of the intestine.