Polyarch xylem bundles are found in

Options

A. Monoct root
B. Dicot root
C. Monocot stem
D. Dicot stem

Answer

### Step-by-Step Solution:

1. **Understanding Polyarch Xylem Bundles**:
- Polyarch xylem bundles refer to a condition where there are more than four xylem and phloem strands present in the vascular bundles.

2. **Identifying the Types of Plants**:
- The question provides four options: monocot root, dicot root, monocot stem, and dicot stem. We need to determine where polyarch xylem bundles are typically found.

3. **Analyzing Monocot Structure**:
- In monocots, the vascular bundles are arranged in a radial and exarch manner. This means that the protoxylem (the first formed xylem) is located at the periphery, while the metaxylem (the later formed xylem) is positioned towards the center.

4. **Understanding the Arrangement**:
- In the radial arrangement of monocot roots, the presence of multiple xylem and phloem strands indicates a polyarch condition. This is characterized by having more than four xylem and phloem strands.

5. **Conclusion**:
- Based on the analysis, polyarch xylem bundles are found in monocot roots. Therefore, the correct answer to the question is **monocot root**.

### Final Answer:
Polyarch xylem bundles are found in **monocot root**.

---