Arrange the stages of construction of highway projects in the correct sequence:
1. Cleaning site of work or construction
2. Construction of drainage work such as culverts etc.
3. Earthwork
4. Construction of road and its shoulders
Select the correct answer using the code given below:
1
1, 2, 3, 4
2
1, 3, 2, 4
3
2, 1, 4, 3
4
3, 4, 1, 2