Presence of straight chain of six carbon atoms in glucose is indicated by its reaction with

• A

  ${\mathrm{NH}}_2-\mathrm{OH}$

• B

  $\mathrm{HCN}$

• C

  $\mathrm{HI}/\mathrm{red} \mathrm{P}, {150}^0\mathrm{c}$

• D

  ${\left[\mathrm{Ag}{\left({\mathrm{NH}}_3\right)}_2\right]}^{+}$