Three types of tissue system have been recognised in plants on the basis of their functions. Select the correct option regarding this.

Options

A. Epidermal tissue system consists of epidermis and epidermal appendages, which provide protection to the internal tissues.
B. all tissues except epidermis and vascular bundles constitute the ghround tissue, which forms the major part of a plat's body
C. vascular tissue system consists of complex tissues i.e., xylem and phloem.
D. all of these

Answer

To answer the question regarding the three types of tissue systems recognized in plants based on their functions, we will analyze each statement provided in the options and determine their correctness.

### Step-by-Step Solution:

1. **Understanding the Tissue Systems**:
- Plants have three main types of tissue systems:
- **Epidermal Tissue System**: This includes the epidermis and its appendages, which primarily provide protection to the internal tissues.
- **Ground Tissue System**: This consists of all tissues in the plant body except for the epidermal and vascular tissues. It forms the majority of the plant's body.
- **Vascular Tissue System**: This comprises complex tissues, specifically xylem and phloem, responsible for the transport of water, nutrients, and food within the plant.

2. **Evaluating the Statements**:
- **Statement 1**: "Epidermal tissue system consists of epidermis and epidermal appendages which provide protection to the internal tissue."
- This statement is correct as the epidermis serves as a protective layer.
- **Statement 2**: "All tissues except epidermis and vascular bundles constitute the ground tissue which forms the majority part of the plant's body."
- This statement is also correct as it accurately describes the ground tissue system.
- **Statement 3**: "The vascular tissue system consists of complex tissues that is xylem and phloem."
- This statement is correct as it defines the vascular tissue system accurately.
- **Statement 4**: "All of these."
- Since all previous statements are correct, this statement is also correct.

3. **Conclusion**:
- Since all the statements regarding the tissue systems are correct, the correct option is "All of these."

### Final Answer:
The correct option regarding the three types of tissue systems recognized in plants based on their functions is **"All of these."**