The correct answer is C. win.metafile.
A win.metafile is a vector graphics file format developed by Microsoft. It is a device-independent graphics format, which means that it can be displayed on any device that supports the Windows GDI (Graphics Device Interface). Win.metafiles are often used to create animated graphics, such as those used in screensavers and cursors.
PDF (Portable Document Format) is a file format developed by Adobe Systems. It is a universal file format that can be used to create and display documents that look the same on any device. PDFs are often used to create electronic versions of books, magazines, and other documents.
SVG (Scalable Vector Graphics) is a vector graphics file format developed by the World Wide Web Consortium (W3C). It is a text-based format that is independent of resolution and device. SVGs are often used to create web graphics, such as logos and icons.
Therefore, the only file format that is graphic device only for Windows is win.metafile.