Assertion: Both apical meristem and intercalary meristem areprimary meristems.
Reason: Both of these meristems appear early in life of a plant and help in the formation of the primary plant body.

Options

A. If both assertion and reason are true and reason is the correct explanantion of assertion
B. if both assertion and reason are true but reason is not the correct explanation of assertion.
C. if assertion is true but reason is false.
D. if both assertion and reason are false.

Explanation

To solve the question regarding the assertion and reason about apical and intercalary meristems, we can break it down step by step.

### Step-by-Step Solution:

1. **Understanding Meristematic Tissues**:
- Meristematic tissues are specialized tissues in plants that are responsible for growth. They consist of undifferentiated cells that can divide and differentiate into various types of cells.

2. **Types of Meristematic Tissues**:
- There are three main types of meristematic tissues:
- **Apical Meristem**: Located at the tips of roots and stems, responsible for the elongation of the plant.
- **Intercalary Meristem**: Found at the base of leaves and internodes, allowing for growth in length at these specific regions.
- **Lateral Meristem**: Involved in the thickening of stems and roots, contributing to secondary growth.

3. **Assertion Analysis**:
- The assertion states that both apical meristem and intercalary meristem are primary meristems. This is true because both types of meristems are involved in the primary growth of the plant, which is the initial growth phase where the plant increases in height and length.

4. **Reason Analysis**:
- The reason states that both of these meristems appear early in the life of a plant and help in the formation of the primary plant body. This is also true, as both apical and intercalary meristems are active during the early stages of plant development and contribute to forming the primary structure of the plant.

5. **Conclusion**:
- Since both the assertion and reason are true, and the reason provides a correct explanation for the assertion, we conclude that both statements are correct and the reason is the correct explanation for the assertion.

### Final Answer:
Both the assertion and reason are true, and the reason is the correct explanation for the assertion.

---