The ground tissue of dicot leaf is

Options

A. Medulla
B. Medullary rays
C. Pericycle
D. Mesophyll

Answer

### Step-by-Step Solution:

1. **Understanding Ground Tissue**:
- Ground tissue in plants refers to the tissue that is neither dermal (protective outer layer) nor vascular (transport system). It primarily serves functions such as photosynthesis, storage, and support.

2. **Identifying the Origin of Ground Tissue**:
- Ground tissue arises from the ground meristem, which is a type of meristematic tissue in plants responsible for producing ground tissue.

3. **Analyzing the Options Provided**:
- The options given are:
1. Medulla
2. Medullary rays
3. Pericycle
4. Mesophyll

4. **Evaluating Each Option**:
- **Medulla**: This term typically refers to the central part of a stem or root, not specifically related to leaves.
- **Medullary Rays**: These are tissue structures found in the stems and roots, not specifically in leaves.
- **Pericycle**: This is a layer of cells in roots that can give rise to lateral roots, not found in leaves.
- **Mesophyll**: This is the ground tissue found in leaves, located between the upper and lower epidermis, and is primarily involved in photosynthesis.

5. **Conclusion**:
- Based on the analysis, the correct answer is **mesophyll**, which is the ground tissue of a dicot leaf.

### Final Answer:
The ground tissue of a dicot leaf is **mesophyll**.