Pith is hollow in

Options

A. 1)Cucurbita stem
B. 2)Oryza stem
C. 3)Wheat stem
D. 4)All of these

Answer

### Step-by-Step Solution

1. **Understanding Pith**: The pith, also known as medulla, is a tissue found in the stems of vascular plants. It is primarily composed of soft, spongy parenchyma cells.

2. **Identifying Hollow Pith**: The question asks in which types of stems the pith is hollow. Hollow pith is typically found in certain monocots and dicots.

3. **Examples of Plants with Hollow Pith**:
- **Monocots**:
- **Oryza sativa (Rice)**: The pith in the rice stem is hollow.
- **Triticum (Wheat)**: The pith in the wheat stem is also hollow.
- **Dicots**:
- **Cucurbita (Pumpkin)**: The pith in the Cucurbita stem is hollow as well.

4. **Analyzing the Options**:
- **Option 1**: Cucurbita stem - Correct, as it has a hollow pith.
- **Option 2**: Oryza stem - Correct, as it has a hollow pith.
- **Option 3**: Wheat stem - Correct, as it has a hollow pith.
- **Option 4**: All of these - Correct, since all mentioned stems have hollow pith.

5. **Conclusion**: Since all the options provided (Cucurbita stem, Oryza stem, and Wheat stem) have hollow pith, the correct answer is **Option 4: All of these**.