Which of the following statements are concerned with eskers and drumlins?
1. Eskers are ridges of crudely bedded gravels and sands.
2. Drumlins are constituted mostly of boulder and clay.
3. Basket of eggs topography is the characteristic of terrains with eskers
4. While eskers are built by glacier streams, drumlins result from glacier action.
Choose the correct answer from the options given below.