Stele without pith is

Options

A. Dictyostele
B. Siphonostele
C. Protostele
D. Solenostele.

Answer

**Step-by-Step Solution:**

1. **Understanding the Term "Stele":**
- A stele is defined as the central core of the stem and root of a vascular plant. It consists of vascular tissues, which include xylem and phloem, along with associated supporting tissues.

2. **Identifying the Types of Stele:**
- The question provides four options: Dictyostele, Siphonostele, Protostele, and Solenostele. Each of these represents a different type of stele found in vascular plants.

3. **Analyzing Each Option:**
- **Dictyostele:** This type has a network of vascular tissues but also contains a central pith, making it an incorrect option for the question.
- **Siphonostele:** This type forms a cylinder of vascular tissue surrounding a central pith, which also makes it incorrect for the question.
- **Solenostele:** Similar to Siphonostele, it has vascular tissue surrounding a central pith, thus also incorrect.
- **Protostele:** This type is characterized by having no central pith, making it the correct answer to the question.

4. **Conclusion:**
- Since the question specifically asks for a stele without pith, the correct answer is **Protostele**.

**Final Answer:**
- The correct option is **Option 3: Protostele**.

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