Sink hole is a phenomenon of ____ topography

 a) Desert
 b) Tundra
 c) Karst
 d) Plain
SSC CGL-2015
Karst.
Karst topography is a landscape formed from the dissolution of soluble rocks such as limestone, dolomite, and gypsum. It is characterized by underground drainage systems with sinkholes, dolines, and caves.
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