1.

(A) At all conditions Mg can reduce Al_(2) O_(3) (R) Below 135^(@)CMg can reduce Al_(2) O_(3)

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Both (A) and (R) are TRUE and (R) is the correct explanation of (A)
Both (A) and (R) are true and (R) is not the correct explanationof (A)
(A) is true but (R) is false
Both (A) and (R) are false

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