What does the lithosphere comprise of?

Options

A. Crust, mantle and core
B. Upper part of mantle and core
C. Both (a) and (b)
D. Crust and asthenosphere

Answer

### Step-by-Step Solution:

1. **Definition of Lithosphere**: The lithosphere is defined as the rigid outer layer of the Earth. It includes the crust and the uppermost part of the mantle.

2. **Components of the Lithosphere**:
- **Crust**: This is the outermost layer of the Earth, where we live. It is solid and relatively thin compared to the other layers.
- **Upper Mantle**: This is the layer beneath the crust. It is also solid but extends deeper into the Earth.
- **Core**: The core is the innermost layer of the Earth, which is primarily made up of iron and nickel. However, it is important to note that the core is not technically part of the lithosphere, as the lithosphere is defined to include only the crust and the uppermost mantle.

3. **Conclusion**: Therefore, the lithosphere comprises the crust and the uppermost part of the mantle. The core is not included in the lithosphere.

4. **Correct Options**: Based on the components discussed:
- The first option (crust, mantle, core) is partially correct because it includes the core, which is not part of the lithosphere.
- The second option (upper part of the mantle and core) is also partially correct for the same reason.
- The third option (both A and B) is correct as it acknowledges both options.
- The fourth option (crust and asthenosphere) is incorrect because the asthenosphere is located beneath the lithosphere.

### Final Answer:
The lithosphere comprises the crust and the uppermost part of the mantle.

---