The six-membered cyclic structure of glucose is called pyranose structure ( $\alpha$ - or $\beta-$ ), in analogy with pyran which is a cyclic organic compound with one oxygen and five carbon atoms in the ring.
Hence, ring $(i)$ is pyranose.
The ring $(i)$ is pyranose with $\alpha$-glycosidic linkage which means the oxide linkage which connects the monosaccharide units in polysaccharide below the plane.
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(Given: specific rotations of ($+$)-sucrose, ($+$)-maltose, $L$-($-$)-glucose anc. $+(+)$-fructose in aqueous solution are $+66^{\circ},+140^{\circ},-52^{\circ}$ and $+92^{\circ}$, respectively)
($A$) 'invert sugar' is prepared by acid catalyzed hydrolysis of maltose
($B$) . 'invert sugar' is an equimolar mixture of $D$-($+$)-glucose and $D$-($-$)-fructose
($C$) specific rotation of 'invert sugar' is $-20^{\circ}$
($D$) on reaction with $\mathrm{Br}_2$ water, 'invert sugar' forms saccharic acid as one of the products