The correct option is
C ether linkage
Glycosidic bond is an ether linkage between two monosaccharides. Oxide or ether linkage between two monosaccharides formed generally by the loss of water.
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1245092/original_16-7-1.png)
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1245096/original_16-7-2.png)
Peptide bond is present between two amino acids.
Hence, (d) is correct.