According to the histogen theory, plerome gives rise to the
(a) Epidermis
(b) Cortex
(c) Pith
(d) Central stele

Options

A. Epidermis
B. Cortex
C. Pith
D. Central stele

Answer

To solve the question regarding the histogen theory and what the plerome gives rise to, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Histogen Theory**:
- The histogen theory was proposed by Hanstein. It divides the plant meristem into three distinct zones: dermatogen, periblem, and plerome.

2. **Identifying the Layers**:
- **Dermatogen**: This is the outermost layer that gives rise to the epidermis.
- **Periblem**: This middle layer develops into the cortex.
- **Plerome**: This is the innermost layer.

3. **Function of Plerome**:
- The plerome is responsible for giving rise to the central stele of the plant. The central stele includes structures such as the pith, pericycle, and vascular bundles.

4. **Analyzing the Options**:
- (a) Epidermis - derived from dermatogen.
- (b) Cortex - derived from periblem.
- (c) Pith - part of the central stele but not the complete answer.
- (d) Central stele - includes pith, pericycle, and vascular bundles, which is the complete structure derived from plerome.

5. **Conclusion**:
- Based on the histogen theory, the correct answer is (d) Central stele, as it encompasses all the components that arise from the plerome.

### Final Answer:
(d) Central stele