I am using filter pane which has list of all countries.When i click on a particular country eg. 'India' list of cities which belongs to India must be shown as a drop down without using another filter pane. Attached is the sample snapshot of the requirement.
This is not native functionality in qlik sense. Your best option is to use the filter chart, add all your multi level fields in order, and set the filter to be a single line. This won't make them cascade, but they will be in a logical order to cut down the selections as you select from the previous one.