Arrange the following structures based on their location from the periphery to centre with respect to the anatomy of a dicotyledonous root.
I Pericycle
II Casparian strips
III Epiblema
IV Conjunctive tissue

Options

A. IV,I,II,III
B. IV,II,III,I
C. I,II,III,IV
D. III,II,I,IV

Answer

To arrange the structures based on their location from the periphery to the center in a dicotyledonous root, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Outermost Layer**: The outermost layer of a dicotyledonous root is the **epiblema** (or epidermis). This layer consists of a single layer of parenchymatous cells and is responsible for protecting the root and absorbing water and nutrients.

2. **Next Layer - Endodermis**: Beneath the epiblema lies the **cortex**, which is made up of loosely arranged parenchymatous cells. The next important layer is the **endodermis**, which consists of a single layer of barrel-shaped cells. The endodermis is characterized by the presence of **Casparian strips** which are thickened cell walls that regulate the flow of water and nutrients.

3. **Following the Endodermis - Pericycle**: Inside the endodermis, we find the **pericycle**. This layer is typically a single layer of parenchymatous cells and is involved in the formation of lateral roots.

4. **Innermost Layer - Conjunctive Tissue**: Finally, the **conjunctive tissue** is located towards the center of the root, separating the xylem and phloem within the vascular bundles.

### Final Arrangement from Periphery to Center:
- **I. Epiblema**
- **II. Casparian strips** (part of the endodermis)
- **III. Pericycle**
- **IV. Conjunctive tissue**

### Answer:
The correct order from periphery to center is:
1. Epiblema (III)
2. Casparian strips (II)
3. Pericycle (I)
4. Conjunctive tissue (IV)