Vegetative propagation through offset is common in :

Options

A. Antigonon
B. Eichhornia
C. Elodea
D. Amorphophallus

Explanation

**Step-by-Step Solution:**

1. **Understand the Concept of Vegetative Propagation:**
- Vegetative propagation is a form of asexual reproduction in plants where new individuals are produced from the vegetative parts of the plant, such as stems, roots, or leaves.

2. **Define Offset:**
- An offset is a short, thick, runner-like branch that grows from the base of a plant. It is capable of forming a new plant at its tip and is genetically identical to the parent plant.

3. **Analyze the Options:**
- The question provides four options: Antigonon, Iconia, Elodea, and Amorphophilus. We need to determine which of these commonly uses offsets for vegetative propagation.

4. **Evaluate Each Option:**
- **Antigonon:** This plant utilizes tubers for vegetative propagation, making this option incorrect.
- **Iconia:** Known as water hyacinth, this plant propagates through offsets, making this option correct.
- **Elodea:** This aquatic plant propagates through fragments, so this option is incorrect.
- **Amorphophilus:** This plant propagates using corms, making this option incorrect.

5. **Conclusion:**
- The correct answer is **Iconia**, as it is the only plant among the options that commonly propagates through offsets.

**Final Answer:**
Vegetative propagation through offset is common in **Iconia**.

---