In isolation of which one of the following metals from their ores, the use of cyanide salt is not commonly involved?

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

FeO + SiO₂ $$\to$$ FeSiO₃

FeO and FeSiO₃ respectively are.

Given are two statements one is labelled as Assertion A and other is labelled as Reason R.

Assertion A : Magnesium can reduce Al₂O₃ at a temperature below 1350$$^\circ$$C, while above 1350$$^\circ$$C, while above 1350$$^\circ$$C aluminium can reduce MgO.

Reason R : The melting and boiling points of magnesium are lower than those of aluminium.

n light of the above statements, choose most appropriate answer from the options given below :

Statement I : Leaching of gold with cyanide ion in absence of air / O₂ leads to cyano complex of Au(III).

Statement II : Zinc is oxidized during the displacement reaction carried out for gold extraction.

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