2018 · Q12
Statement IBy far the most common topographic form in a Karst terrain is the sinkhole.
Statement IITopographically, a sinkhole is a depression that varies in depth from less than a meter to few hundred metres.
General KnowledgeGeography
- ABoth the statements are individually true and Statement II is the correct explanation of Statement I
- BBoth the statements are individually true but Statement II is not the correct explanation of Statement I
- CStatement I is true but Statement II is false
- DStatement I is false but Statement II is true
Explanation
Sinkholes (dolines) are indeed the most common topographic form in karst terrain, so Statement I is true. Statement II is also true: topographically, a sinkhole is a depression ranging from under a metre to a few hundred metres deep. However, Statement II merely describes a sinkhole's size; it does not explain why sinkholes are the commonest karst form, which is due to the solution of soluble rock. Both statements are true, but II is not the correct explanation of I.