The correct answer is option 1, Chhota Nagpur plateau. The Chhota Nagpur plateau is located in the north-east of the Deccan plateau. A plateau is a flat-topped elevated landform that rises above the surrounding area. The Deccan plateau itself is a large plateau in central India, covering parts of several states.
Option 2, Malawa plateau, is not correct because it is located in the western part of Madhya Pradesh, which is not in the north-east of the Deccan plateau.
Option 3, Deccan plateau, is not correct because the Deccan plateau is the larger plateau that the north-east region is a part of.
Option 4, Vindhyan Range, is not correct because it is a mountain range that runs parallel to the north-eastern edge of the Deccan plateau, not part of the plateau itself.
Therefore, the correct answer is option 1 - Chhota Nagpur plateau.