Explanation:

statement 1 is correct: The interior of the earth is broadly divided into 3 layers:

The Crust - It is the outermost solid part of the earth. It is brittle in nature. The thickness of the crust varies under the oceanic and continental areas. Oceanic crust is thinner as compared to the continental crust. The mean thickness of oceanic crust is 5 km whereas that of the continental is around 30 km. The continental crust is thicker in the areas of major mountain systems. It is as much as 70 km thick in the Himalayan region.

statement 2 is incorrect: The Mantle - The portion of the interior of the earth beyond the crust is called the mantle. The mantle extends up to a depth of 2,900 km. The upper portion of the mantle is called ‘asthenosphere’ – it is in semi-molten or plastic state. The word ‘astheno’ itself means weak. It is considered to be extending up to 400km. It is the main source of magma that finds its way to the surface during volcanic eruptions. The crust and the uppermost part of the mantle are called lithosphere. Its thickness ranges from 10-200 km. The lower mantle extends beyond the asthenosphere. It is in solid state.

statement 3 is incorrect: The core : It is the innermost layer of the Earth. The core-mantle boundary is located at the depth of 2,900 km. The outer core is in liquid state while the inner core is in solid state. TheCore is made up of very heavy material mostly constituted by nickel and iron. It is sometimes referred to as the ‘nife’ layer.