The jQuery Ajax method that cannot be used to work with response data in XML format is `$.getScript()`.
This method is specifically designed to load and execute JavaScript code. It does not support loading or parsing XML data.
To work with response data in XML format, you should use either the `$.ajax()` method with the `dataType` option set to `"xml"`, or the `$.get()` method with the `"xml"` data type parameter. These methods will ensure that the response is treated as XML data and can be manipulated as such in the success callback function.