Crypts of Lieberkuhn are present in

Options

A. small intestine
B. large intestine
C. stomach
D. oesophagus

Explanation

### Step-by-Step Solution:

1. **Identify the Structure**: The question asks about the location of the Crypts of Lieberkühn. These are glandular structures found in the digestive system.

2. **Locate the Digestive System**: The digestive system consists of various organs including the mouth, esophagus, stomach, small intestine, and large intestine.

3. **Focus on the Small Intestine**: The Crypts of Lieberkühn are specifically located in the small intestine.

4. **Identify the Specific Part**: The small intestine is divided into three parts: duodenum, jejunum, and ileum. The Crypts of Lieberkühn are primarily found in the ileum, which is the final portion of the small intestine.

5. **Understand Their Function**: The Crypts of Lieberkühn are located at the base of the villi in the small intestine. Their primary function is to increase the surface area for the absorption of digested nutrients.

6. **Conclude the Answer**: Based on the above points, we can conclude that the Crypts of Lieberkühn are present in the small intestine, specifically at the base of the villi in the ileum.

### Final Answer:
Crypts of Lieberkühn are present in the small intestine, particularly in the ileum.