The correct answer is D. Both 1 and 2.
The Chhota Nagpur plateau is a large plateau in eastern India. It is located in the states of Jharkhand, Chhattisgarh, Odisha, and West Bengal. The plateau has an elevation of about 300 – 450 meters above sea-level. The plateau was formed by the second upliftment of the Indian Plate. The second upliftment occurred about 200 million years ago. The upliftment formed the outer Chhota Nagpur plateau. The outer Chhota Nagpur plateau is a series of hills and valleys. The hills are made of sandstone and the valleys are made of shale. The plateau is a major source of coal and iron ore.
Statement 1 is correct because the Chhota Nagpur plateau has an elevation of about 300 – 450 meters above sea-level.
Statement 2 is correct because the second upliftment formed outer Chhota Nagpur plateau.
Therefore, both statements are correct.