Penta acetate of glucose $\xrightarrow[{\operatorname{Re} agent}]{{Tollen's}}$ $+\,ve$ test $(A)$
Penta acetate of glucose $\xrightarrow{{Benedicts}}$ $+\,ve$ test $(B)$
Penta acetate of glucose $\xrightarrow[{\operatorname{Re} agent}]{{Schiffs}}$ $-\,ve$ test $(C)$
Penta acetate of glucose $\xrightarrow{{NaHS{O_3}}}$ $-\,ve$ test $(D)$
$Hb{O_2} + {H_3}{O^ + }C{O_2} \rightleftharpoons \left( {{H^ + } - Hb - C{O_2}} \right) + {O_2} + {H_2}O$
Release of $O_2$ is favoured when there is