Finely dissected leaves occur in

Options

A. Free floating plants
B. Rooted floating leaved plants
C. Submerged plants
D. Emerged plants.

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the occurrence of finely dissected leaves in specific types of plants. We need to identify which type of plant has this characteristic.

2. **Analyzing the Options**: The options provided are:
- Free floating plants
- Rooted floating leaf plants
- Submerged plants
- Emerged plants

3. **Defining Finely Dissected Leaves**: Finely dissected leaves are characterized by their intricate, feather-like structure. This dissection typically extends to the midrib of the leaf.

4. **Identifying the Correct Option**:
- **Free Floating Plants**: These plants float on the surface of the water and usually have broader leaves.
- **Rooted Floating Leaf Plants**: These plants have leaves that float on the surface but are rooted in the substrate; they also do not typically have finely dissected leaves.
- **Submerged Plants**: These plants are entirely underwater, and their leaves are finely dissected to adapt to the aquatic environment. This dissection helps reduce resistance in water and allows for better light capture.
- **Emerged Plants**: These plants have leaves that are above the water surface and do not typically exhibit finely dissected leaves.

5. **Conclusion**: Based on the analysis, the correct answer is **submerged plants**, as they are the ones that exhibit finely dissected leaves.

**Final Answer**: Finely dissected leaves occur in **submerged plants**.

---