The most fitting response to the question regarding the irony of the setting in “The Open Window” is:
The setting is a “restful country spot,” but proves to be unsettling because of the niece’s stories.
This choice highlights the contrast between the expected tranquility of a rural retreat and the disturbing tale told by Vera, which creates a sense of tension and unease in what is otherwise portrayed as a serene environment. This irony is central to the story's impact, as the peaceful setting becomes the backdrop for a haunting narrative that ultimately leads to Framton Nuttel's panic.