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 solve the question of arranging the structures of a dicotyledonous root from the periphery to the center, we need to understand the anatomy of the root and the location of each structure mentioned.

### Step-by-Step Solution:

1. **Identify the Structures**: We have four structures to arrange:
- I. Pericycle
- II. Casparian strips
- III. Epiblema
- IV. Conjunctive tissue

2. **Understand the Anatomy of a Dicotyledonous Root**: The typical arrangement of structures in a dicotyledonous root from the outermost to the innermost is as follows:
- **Epiblema**: This is the outermost layer of the root, also known as the epidermis.
- **Cortex**: Located just beneath the epiblema, it is the region that stores food and provides support.
- **Endodermis**: This is the innermost layer of the cortex, which contains the Casparian strips that regulate the flow of water and nutrients into the vascular system.
- **Pericycle**: This is the layer just inside the endodermis and is involved in the formation of lateral roots.
- **Vascular Tissue**: This includes xylem and phloem, which are responsible for the transport of water, nutrients, and food.
- **Conjunctive Tissue**: This tissue is found between the xylem and phloem in the vascular bundles.

3. **Arranging the Structures**:
- From the outermost to the innermost:
1. **Epiblema** (III)
2. **Casparian strips** (II, found in the endodermis)
3. **Pericycle** (I)
4. **Conjunctive tissue** (IV, found within the vascular bundles)

4. **Final Arrangement**: Based on the above understanding, the correct order from periphery to center is:
- III (Epiblema) → II (Casparian strips) → I (Pericycle) → IV (Conjunctive tissue)

### Conclusion:
The correct arrangement from the periphery to the center is:
**Epiblema (III) → Casparian strips (II) → Pericycle (I) → Conjunctive tissue (IV)**.