On studying the T.S. of an organ, a student found , xylem and phloem are arranged in an alternate manner on different radii , this organ will be :

Options

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

Answer

To determine the organ studied by the student based on the arrangement of xylem and phloem in an alternate manner on different radii, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Arrangement**: The question states that xylem and phloem are arranged in an alternate manner on different radii. This indicates a specific type of vascular bundle arrangement.

2. **Identify the Type of Vascular Bundle**: The arrangement described is known as "radial vascular bundles." In radial vascular bundles, the xylem and phloem are separated from each other and are located on different radii.

3. **Know Where Radial Vascular Bundles are Found**: Radial vascular bundles are typically found in the roots of plants, specifically in both monocots and dicots.

4. **Evaluate the Options**:
- **Option 1: Dicot Root** - This is a valid option since radial vascular bundles are found here.
- **Option 2: Dicot Leaf** - This option is incorrect as leaves do not have radial vascular bundles.
- **Option 3: Monocot Stem** - This option is also incorrect because monocot stems have collateral vascular bundles, not radial.
- **Option 4: Dicot Stem** - This is incorrect as well since dicot stems also have collateral vascular bundles.

5. **Conclusion**: Based on the analysis, the organ that the student studied is the **dicot root**, as it is the only option that contains radial vascular bundles.

### Final Answer:
The organ will be: **Dicot Root**.

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