Inner lining of gut, stomach and liver is made of
(a) Simple squamous epithelium
(b) Simple columnar epithelium
(c) Simple cuboidal epithelium
(d) All the above

Options

A. Simple squamous epithelium
B. Simple columnar epithelium
C. Simple cuboidal epithelium
D. All the above

Answer

To determine the type of epithelium that makes up the inner lining of the gut, stomach, and liver, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Organs**: The question specifies three organs: the gut, stomach, and liver. We need to understand the type of epithelial tissue that lines these organs.

2. **Understand Epithelial Types**: There are different types of epithelial tissues:
- **Simple Squamous Epithelium**: A single layer of flat cells, typically found in areas where diffusion or filtration occurs.
- **Simple Columnar Epithelium**: A single layer of tall, column-like cells, often involved in absorption and secretion.
- **Simple Cuboidal Epithelium**: A single layer of cube-shaped cells, commonly found in glands and ducts.

3. **Research the Inner Lining**: The inner lining of the gut, stomach, and liver is primarily involved in absorption and secretion.

4. **Determine the Correct Epithelium**:
- The gut (including the intestines) and stomach are lined with **simple columnar epithelium**, which is specialized for absorption and secretion.
- The liver, while it has a different function, also has areas lined with simple columnar epithelium in its ducts.

5. **Evaluate the Options**:
- (a) Simple squamous epithelium: Not correct for these organs.
- (b) Simple columnar epithelium: Correct for the gut and stomach.
- (c) Simple cuboidal epithelium: Not correct for these organs.
- (d) All of the above: Incorrect since only simple columnar epithelium is applicable.

6. **Conclusion**: The inner lining of the gut, stomach, and liver is primarily made of **simple columnar epithelium**.

### Final Answer:
(b) Simple columnar epithelium