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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 from Mg → MgO at ~ 1120°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 :

1. Both A and R are true but R is NOT the correct explanation of A
2. A is false but R is true
3. Both A and R are true and R is the correct explanation of A
4. A is true but R is false

Correct answer: Both A and R are true and R is the correct explanation of A

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