A process of breaking seed dormancy of some plants in which seeds are treated in moist medium at low temperature `(5-10^(@)C)` for period of time is known as.

Options

A. scarification
B. stratification
C. vernalisation
D. none of these

Answer

### Step-by-Step Solution

1. **Understanding Seed Dormancy**: Seed dormancy is a period during which seeds are inactive and do not germinate, even under favorable conditions. Breaking this dormancy is essential for the seeds to germinate.

2. **Identifying the Process**: The question asks for a specific process that involves treating seeds in a moist medium at low temperatures (5-10°C) to break dormancy.

3. **Analyzing the Options**: The options provided are:
- **Scarification**: This process involves making the seed coat permeable to water, allowing the seed to absorb moisture and germinate. It does not specifically involve low temperatures.
- **Stratification**: This is the process where seeds are exposed to cold, moist conditions to simulate winter. This treatment helps break dormancy and prepares the seeds for germination.
- **Vernalization**: This process involves exposing plants (especially flowers) to low temperatures to induce flowering. It is not directly related to seed germination.

4. **Selecting the Correct Answer**: Based on the definitions and processes described:
- **Scarification** is not the correct answer as it does not involve low temperatures.
- **Vernalization** is also not correct since it pertains to flowering rather than seed germination.
- **Stratification** is the correct answer, as it specifically refers to the treatment of seeds at low temperatures to break dormancy.

5. **Conclusion**: The process of breaking seed dormancy by treating seeds in a moist medium at low temperatures (5-10°C) is known as **Stratification**.

### Final Answer
**Stratification**

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