The correct option is (c).
Explanation
The internal structure of the Earth is divided into three concentric layers based on composition and physical properties: the Crust, the Mantle, and the Core.- Statement 1 is Correct: The Mantle extends from the base of the crust (marked by the Mohorovicic discontinuity) down to a depth of approximately 2,900 km. At this depth, the Gutenberg discontinuity separates the Mantle from the Core.
- Statement 2 is Incorrect: The Mantle is the intermediate layer of the Earth. The innermost layer is the Core, which is further divided into the liquid Outer Core and the solid Inner Core.
- Statement 3 is Correct: The Mantle lies immediately beneath the Crust. The boundary separating the Crust and the Mantle is known as the Mohorovicic discontinuity (often referred to as the Moho).
Key Takeaway: The Mantle is the thickest layer of the Earth by volume, situated between the Crust and the Core, and extends to a depth of 2,900 km.