A. .odt
B. .ods
C. .odp
D. .rtf
'.rtf' is a extension of WordPad which is inbuilt product of Microsoft and is not a part of LibreOffice .
where
.odf, .ods and .odp belongs to LibreOffice
.odf - Open Document Format
.ods - Open Document Spreadsheet
.odp - Open Document Presentation