In the metallurgical extraction of copper, following reaction is used :

$FeO + SiO _{2} \rightarrow FeSiO _{3}$

$FeO$ and $FeSiO _{3}$ respectively are.

Assertion : Coke and flux are used in smelting.

Reason : The phenomenon in which ore is mixed with suitable flux and coke is heated to fusion is known as smelting.

Formation of metallic copper from the sulphide ore in the normal thermo-metallurgical process essentially involves which one of the following reaction.

Among the following statemetns, the incorrect one is :

Given below are two statements.

Statement $I :$ According to the Ellingham diagram, any metal oxide with higher $\Delta G ^{\circ}$ is more stable than the one with lower $\Delta G ^{\circ}$.

Statement $II :$ The metal involved in the formation of oxide placed lower in the Ellingham diagram can reduce the oxide of a metal placed higher in the diagram.

In the light of the above statements, choose the correct answer from the options given below.