Consider the following statements regarding the layers of the earth?
1. The upper portion of the mantle is called the asthenosphere.
2. Lehman discontinuity is the boundary between the outer core and Mantle
3. Core has the heaviest minerals of highest density.
Which among the following above given statements are correct?
1
1 and 2
2
2 and 3
3
1 only
4
1 and 3 only