Which of the following are the primary reasons for landslides in India?
1. Heavy rainfall
2. Deforestation
3. Construction of retaining walls along slopes
4. River erosion
5. Earthquakes
Select the correct answer using the code given below:
1
1 and 4 only
2
2 and 5 only
3
1, 2, 4, and 5 only
4
2, 3 and 4 only