Incorrect statements about the plot is / are :

${\mathrm{T}}_1$ and ${\mathrm{T}}_2$are melting point and boiling point of $\mathrm{Mg}$ respectively

${\mathrm{T}}_1$ and ${\mathrm{T}}_2$are melting point and boiling point of $\mathrm{MgO}$ respectively.

Reduction of $\mathrm{MgO}$ by coke is possible above ${\mathrm{T}}_3$ .

$\mathrm{Mg}$ can be extracted from gaseous products b rapid cooling.