Cryopreservation is done at the temperature :

Options

A. `-140 ^(@) C`
B. `-120 ^(@) C`
C. `-196 ^(@) C`
D. `-273 ^(@) C`

Answer

**Step-by-Step Solution:**

1. **Understanding Cryopreservation**: Cryopreservation is a technique used to preserve cells, tissues, or organs by cooling them to very low temperatures. This process is crucial for various applications in biology and medicine, such as storing sperm, embryos, and other living tissues.

2. **Identifying the Temperature Range**: The question provides several temperature options: -140°C, -120°C, -196°C, and -273°C. To answer the question, we need to determine which of these temperatures is commonly used in cryopreservation.

3. **Recognizing the Common Cryopreservation Temperature**: In the context of cryopreservation, the most commonly used temperature is -196°C. This temperature is achieved using liquid nitrogen, which allows for the complete freezing of biological materials.

4. **Conclusion**: Therefore, the correct answer to the question "Cryopreservation is done at the temperature:" is -196°C.

**Final Answer**: Cryopreservation is done at the temperature of -196°C.

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