The cambial ring formed in stelar region of dicot stem is

Options

A. acompletely secondary in origin
B. primary meristem
C. partly parimary and partly secondary in origin
D. derived completely from cell of residual meristem

Answer

To answer the question regarding the cambial ring formed in the stelar region of a dicot stem, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Structure of Dicot Stem:**
- In dicot stems, vascular bundles are arranged in a ring formation, which is different from monocots where they are scattered.

2. **Identify the Cambial Ring:**
- The cambium is a layer of meristematic tissue that contributes to secondary growth. In dicots, it forms a ring structure between the xylem (inside) and phloem (outside).

3. **Formation of Cambial Ring:**
- Initially, during the early stages of growth, the cambium develops in the center of the vascular bundles. As the plant matures and undergoes secondary growth, the cambial cells begin to connect with each other, forming a continuous ring.

4. **Types of Cambium:**
- The cambial ring consists of both primary and secondary cambium. The primary cambium is derived from the apical meristem, while the secondary cambium arises from the differentiation of the primary tissues.

5. **Conclusion:**
- The cambial ring in the stelar region of a dicot stem is partially primary and partially secondary in origin. Therefore, the correct answer is option C.