In a Pinnate compound leaf (e.g., Neem) a number of leaflets are present on a common axis, the rachis represents the-

Options

A. Vein
B. Veinlet
C. Midrib
D. Stipulc

Answer

To solve the question regarding the rachis in a pinnate compound leaf (like Neem), we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Leaf Structure**:
- A leaf can be classified as simple or compound. In a simple leaf, the lamina is undivided, while in a compound leaf, the lamina is divided into multiple leaflets.

2. **Identifying Pinnate Compound Leaf**:
- In a pinnate compound leaf, the leaflets are arranged along a common axis known as the rachis. The rachis is an extension of the petiole and serves as the central support for the leaflets.

3. **Defining Rachis**:
- The rachis is the part of the leaf that connects the leaflets to the petiole. It is important to note that the rachis does not perform the same function as the midrib of a simple leaf.

4. **Comparing with Other Options**:
- The question provides options:
a) Vein
b) Well
c) Midrib
d) Stipule
- The midrib refers to the central vein of a simple leaf, which is not applicable here since we are discussing a compound leaf.

5. **Conclusion**:
- Since the rachis serves as the common axis for the leaflets in a pinnate compound leaf, it represents the midrib in terms of its function in supporting the leaflets.

### Final Answer:
The rachis represents the **midrib** (Option C).

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