Anatomically jute fibres are
(a) Xylem fibers
(b) Cortial fibers
(c) Pith fibers
(d) phloem fibers

Options

A. Xylem fibers
B. Cortial fibers
C. Pith fibers
D. phloem fibers

Answer

To determine the anatomical classification of jute fibers, we need to analyze the options provided:

1. **Understanding Jute Fibers**: Jute fibers are derived from the plants of the genus Corchorus, specifically Corchorus capsularis and Corchorus olitorius. These plants are known for their fibrous stems.

2. **Analyzing the Options**:
- **(a) Xylem Fibers**: Xylem fibers are associated with the vascular tissue that transports water and nutrients. They are not the source of jute fibers.
- **(b) Cortical Fibers**: Cortical fibers are found in the cortex of the plant stem, but they are not the primary source of jute fibers.
- **(c) Pith Fibers**: Pith fibers come from the pith region of the stem, which is not where jute fibers are derived.
- **(d) Phloem Fibers**: Phloem fibers, also known as bast fibers, are found in the phloem tissue of the plant. Jute fibers are indeed classified as phloem fibers, as they are derived from the secondary phloem of the jute plants.

3. **Conclusion**: Based on the analysis, the correct answer is (d) phloem fibers.

### Step-by-Step Solution:
1. Identify the type of plant from which jute fibers are derived (Corchorus species).
2. Understand the structure of the plant and where fibers are located (phloem vs. xylem).
3. Analyze each option to see which one corresponds to the anatomical classification of jute fibers.
4. Conclude that jute fibers are classified as phloem fibers.