Answer : 4. "500m "
Explanation :

1. The southeastern part of Rajasthan is a plateau, which is known as the 'South-Eastern Plateau and Hadoti Plateau'. This is an extension of the Malwa plateau.

2. The average height of this area is 500 meters and there is an extension of mountain ranges in a semi-moon shape which are known as Bundi and Mukundwara hills respectively. Chambal River and its main tributaries Kalisingh, Parvan and Parvati rivers flow here, the plains created by them are suitable for agriculture.

3. Southern-Eastern Plateau Region (Hadoti Plateau) Main features -

- 11 per cent of the state's population lives in this area.

- South Eastern Plateau region is 9.6 per cent of the total area of the state.

-It extends to Bhilwara, Photo, Bundi, Jhalawar and Baran districts.

- This plateau part is the Sankranti region between the Aravalli and Vindhyachal mountains.

- In this region there is a mixture of lava rocks and Vindhya rocks.