Loss of water from the plants in the form of vapour state is known as:

Options

A. guttation
B. imbibition
C. transpiration
D. translocation

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the process by which plants lose water in the form of vapor.

2. **Analyzing the Options**:
- **Gratation**: This refers to the excretion of xylem sap from hydrothodes, which is not related to water loss in vapor form.
- **Imbibation**: This is the process of absorption of water by hydrophilic substances, which is the opposite of water loss.
- **Translocation**: This term describes the long-distance movement of materials (including nutrients and water) within the plant, but it does not specifically refer to water loss.
- **Transpiration**: This is the process where water is lost from the plant, primarily through the leaves, in the form of vapor.

3. **Identifying the Correct Answer**: Based on the definitions, transpiration is the only term that accurately describes the loss of water vapor from plants.

4. **Conclusion**: Therefore, the correct answer to the question is **transpiration**.

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