Evidence for the presence of straight chain of carbon atoms in glucose is shown by its reaction with

• A

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

• B

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

• C

  $\mathrm{conc}.{\mathrm{HNO}}_3$

• D

  $\mathrm{HCN}$