Explanation:

Statement 1 is correct: Karst topography, often referred to simply as "karst," is a distinctive landscape that results from the dissolution of soluble rocks, primarily limestone, gypsum, and dolomite. It has various unique surface features, including sinkholes, caves, disappearing streams, underground drainage systems, and limestone pavements. Any limestone or dolomitic region showing typical landforms produced by the action of groundwater through the processes of solution and deposition is called Karst topography. Statement 2 is incorrect: In Karst topography, both erosional and depositional factors are active in the formation of landforms like poljes, sinkholes, lapies, limestone pavements, stalactites, stalagmites, pillars, etc.