Which one of the following is an example of primary meristematic tissue ?

Options

A. Phellogen
B. Vascular cambium in dicot roots
C. Intrafascicular cambium
D. Interfascicular cambium

Explanation

To determine which of the following is an example of primary meristematic tissue, we need to analyze the options provided.

### Step-by-Step Solution:

1. **Understanding Meristematic Tissues**:
- Meristematic tissues are groups of undifferentiated cells that have the ability to divide and give rise to various types of tissues. They are classified into primary and secondary meristems.
- Primary meristems are responsible for the primary growth of plants, which increases the length of the plant.

2. **Identifying Primary Meristematic Tissues**:
- The primary meristematic tissues include:
- Protoderm: gives rise to the epidermis.
- Ground meristem: gives rise to ground tissues (cortex and pith).
- Procambium: gives rise to vascular tissues (xylem and phloem).

3. **Analyzing the Options**:
- If the options include terms like phallogen, vascular cambium, intrafascicular cambium, and interfascicular cambium, we need to identify which of these is a primary meristem.
- Phallogen is a secondary meristematic tissue that contributes to the formation of the periderm (secondary protective tissue).
- Vascular cambium is also a secondary meristem that contributes to secondary growth in stems and roots.
- Interfascicular cambium is a secondary meristem that forms between vascular bundles and is responsible for lateral growth.

4. **Correct Identification**:
- The intrafascicular cambium is the only option that is a primary meristematic tissue. It is located between xylem and phloem in vascular bundles and is responsible for the primary growth of the plant.

5. **Conclusion**:
- Therefore, the correct answer to the question is **intrafascicular cambium**, as it is an example of primary meristematic tissue.