Five words have been given, out of which four are alike in some manner and one is different.
Select the odd one.

Cliffs, Lapies, Stalactites, Sinkholes, Stalagmites

Given: Cliffs, Lapies, Stalactites, Sinkholes, Stalagmites

Logic: Stalactites, Stalagmites, Lapies, and Sinkholes are all features formed due to limestone erosion and karst topography.

Cliffs, on the other hand, are generally formed due to erosion by wind, water, or tectonic activity, but they are not specifically related to karst landforms.

So, Cliffs is the odd one out.

Thus, the correct answer is (d).