Option 1 states that Mahadeo hills are in the west of Maikala hills. This means that the Mahadeo hills are located on the western side of the Maikala hills.
Option 2 suggests that Mahadeo hills are a part of the Karnataka Plateau. However, this statement is incorrect as Mahadeo hills are not geographically associated with the Karnataka Plateau.
Option 3 claims that Mahadeo hills are in the east of Chhotahagpur Plateau. This statement is also incorrect as Mahadeo hills are not situated on the eastern side of the Chhotahagpur Plateau.
Option 4 states that Mahadeo hills are a part of the Aravalli ranges. However, this statement is incorrect as Mahadeo hills are geographically distinct and not a part of the Aravalli ranges.
Therefore, out of the given options, option 1 is the correct statement because it correctly describes the location of Mahadeo hills in relation to Maikala hills.