Isolation Of Elements

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R

Assertion A : In the Ellingham diagram, a sharp change in slope of the line is observed for \(\mathrm{Mg} \rightarrow \mathrm{MgO}\) at \(\sim 1120^{\circ} \mathrm{C}\)

Reason R: There is a large change of entropy associated with the change of state

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