Cryopreservation of gametes of threatened species in viable and fertile condition can be referred to as:

Options

A. In situ conservation by sacred groves
B. In situ cryo-conservation of biodiversity
C. In situ conservation of biodiversity
D. Advanced ex-situ conservation of biodiversity

Answer

To solve the question regarding the cryopreservation of gametes of threatened species in a viable and fertile condition, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Cryopreservation**:
- Cryopreservation is a technique where biological samples, such as gametes (sperm and eggs), are preserved by cooling them to very low temperatures. This process helps in maintaining the viability and fertility of the cells.

2. **Identifying Conservation Types**:
- There are two main types of conservation: **in-situ** and **ex-situ**.
- **In-situ conservation** refers to the conservation of species in their natural habitats.
- **Ex-situ conservation** involves the preservation of components of biodiversity outside their natural habitats.

3. **Evaluating the Options**:
- **Option 1: In-situ conservation by the sacred grooves**: This is incorrect as it refers to conserving species in their natural environment, not through cryopreservation.
- **Option 2: In-situ cryopreservation of biodiversity**: This is also incorrect because it combines in-situ conservation with cryopreservation, which is not applicable.
- **Option 3: In-situ conservation of biodiversity**: This option is incorrect as it does not involve cryopreservation.
- **Option 4: Advanced in-situ conservation of biodiversity**: This option is correct as it implies a more sophisticated method of conserving biodiversity, which includes the cryopreservation of gametes outside their natural habitat while maintaining their viability and fertility.

4. **Conclusion**:
- Based on the evaluation of the options, the correct answer is **Option 4: Advanced in-situ conservation of biodiversity**.