$\mathop {{\rm{Grey tin}}}\limits_{{\rm{(Cubic)}}} $ $ \rightleftharpoons $ $\mathop {{\rm{White tin}}}\limits_{{\rm{(Tetragonal)}}} $
The change of white tin to grey tin is accompanied by increase in volume. This is called tin disease or tin plague.
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Method $1\,:\,$ $RBr\xrightarrow[diethyl\,\,ether]{Mg}RMgBr\xrightarrow[2.\,{{H}_{3}}{{O}^{+}}]{1.\,C{{O}_{2}}}RC{{O}_{2}}H$
Method $2\,:\,$ $RBr\xrightarrow{NaCN}RCN\xrightarrow[heat]{{{H}_{2}}O,HCl}RC{{O}_{2}}H$
Which one of the following statements correctly describes this conversion ?
Statments $I:$ Maltose has two $\alpha$-D-glucose units linked at $C _{1}$ and $C _{4}$ and is a reducing sugar.
Statement $II:$ Maltose has two monosaccharides: $\alpha$-D-glucose and $\beta$-D-glucose linked at $C_{1}$ and $C_{6}$ and it is a non-reducing sugar.
In the light of the above statements, choose the correct answer from the options given below.
(Molecular Weight of $\mathrm{HNO}_{3}=63$ )