Which one of the following is a type of tissues system

Options

A. parenchyma
B. sclerenchyma
C. vascular
D. all the above

Answer

To answer the question "Which one of the following is a type of tissue system?" we will analyze the options provided and understand the classification of tissue systems in plants.

### Step-by-Step Solution:

1. **Understanding Tissue Systems**:
- In plants, tissue systems are classified into three main types:
- **Epidermal Tissue System**: This is the outermost layer that protects the plant. It includes structures like the epidermis, stomata, and hairs.
- **Ground Tissue System**: This consists of simple tissues such as parenchyma, colenchyma, and sclerenchyma. These tissues are primarily involved in storage, photosynthesis, and support.
- **Vascular Tissue System**: This includes complex tissues that are involved in the transport of water, nutrients, and food. The main components are xylem and phloem.

2. **Analyzing the Options**:
- **Option 1: Parenchyma**: This is a type of simple tissue found within the ground tissue system, not a tissue system itself.
- **Option 2: Sclerenchyma**: Similar to parenchyma, sclerenchyma is also a type of simple tissue under the ground tissue system, not a separate tissue system.
- **Option 3: Vascular**: This refers to the vascular tissue system, which is indeed one of the three main tissue systems in plants.
- **Option 4: All of the above**: Since parenchyma and sclerenchyma are not tissue systems, this option is incorrect.

3. **Conclusion**:
- The correct answer is **Option 3: Vascular**, as it is one of the three primary tissue systems in plants.

### Final Answer:
**The correct answer is Vascular (Option 3).**