Which of the following statements regarding plains is/are correct?
1. Plains have an extensive flat surface with no deep valleys or large hills.
2. Plains are generally more than 500 meters above sea level.
3. Plains are formed by the deposition of sediments carried by rivers.
Select the correct answer using the code given below:
1
1 and 3 only
2
2 and 3 only
3
1 and 2 only
4
1, 2, and 3