Lithosphere consists of

Options

A. Crusts of earth
B. Upper part of mantle
C. Both A and B
D. Crust and asthenosphere.

Answer

### Step-by-Step Solution:

1. **Understanding Lithosphere**:
- The lithosphere is defined as the rocky outer part of the Earth. It includes both the crust and the uppermost part of the mantle.

2. **Components of Lithosphere**:
- The lithosphere consists of two main components:
- **Crust**: This is the outermost layer of the Earth, which is solid and brittle.
- **Upper part of the Mantle**: This is the layer just below the crust, which is also solid and contributes to the lithosphere.

3. **Identifying the Correct Options**:
- The question provides several options regarding what the lithosphere consists of:
- **A**: Crust of the Earth
- **B**: Upper part of the mantle
- **C**: Both A and B
- **D**: Crust and asthenosphere
- From our understanding, both the crust and the upper part of the mantle are included in the lithosphere.

4. **Eliminating Incorrect Options**:
- The asthenosphere, which lies beneath the lithosphere, is not part of the lithosphere itself. Therefore, the option that includes the asthenosphere is incorrect.

5. **Conclusion**:
- The correct answer is **C: Both A and B**. The lithosphere consists of the crust of the Earth and the upper part of the mantle.