For the formation of a organ :-

Options

A. Only a single type of tissue is required
B. Two types of tissues are required
C. Any three types of tissues are required.
D. All four types of tissues are required.

Answer

### Step-by-Step Solution:

1. **Understanding Organ Formation**:
- An organ is a structure composed of different types of tissues that work together to perform specific functions.

2. **Identifying Types of Tissues**:
- There are four main types of tissues necessary for the formation of an organ:
- **Connective Tissue**: This tissue connects different organs and supports the structure of the organ. It can connect muscles to bones and other organs.
- **Muscle Tissue**: This tissue is responsible for the movement of the organ. Different types of muscle tissue (skeletal, smooth, and cardiac) may be involved depending on the organ's function.
- **Epithelial Tissue**: This tissue provides protection for the organ and may also be involved in secretion and absorption. It can include specialized forms like ciliated epithelium for movement.
- **Nervous Tissue**: This tissue is crucial for signaling and communication within the organ. It connects the organ to the brain and spinal cord, allowing for coordination and response to stimuli.

3. **Conclusion**:
- For the formation of any organ, all four types of tissues (connective, muscle, epithelial, and nervous) are required. Therefore, the correct answer is that all four types of tissues are necessary for organ formation.