Various landforms observed on the surface of the earth are due to the

1) differences in the type and structure of the crustal material
2) differences in the land forming processes
3) differential rates of the processes at different places on the Earth’s surface
Select the correct answer
 a) 1 only
 b) 1 and 2 only
 c) 2 and 3 only
 d) 1,2 and 3

CAPF 2015

1,2 and 3