Which of the following statements is not correct?

→CO₂ is neither combustible nor supporter of combustion
→ CO is a combustable gas

$\mathrm{CO}+\frac{1}{2}{\mathrm{O}}_2\to \underset{\mathrm{Blue} \mathrm{flames}}{{\mathrm{CO}}_{2\left(\mathrm{g}\right)}}+∆$
→ CO Can't reduce alkali metal oxides
Since, alkali metals have grater tendency towards oxygen than "CO"
 

→CO₂ can't reduces the CuO to Cu
 

Where as CO can reduces the CuO to Cu

$\mathrm{CO}+\mathrm{CuO}\to {\mathrm{CO}}_2+\mathrm{Cu}$