The correct statement about the following disaccharide is

Options

1. ARing (a) is pyranose with $\alpha$-glycosidic link
2. BRing (a) is furanose with $\alpha$-glycosidic link
3. CRing (b) is furanose with $\alpha$-glycosidic link
4. DRing (b) is pyranose with $\beta$-glycosidic link